Rosh Hashanah 31

שאני התם דשירה דיומיה היא

The Gemara rejects this argument. It is different there, as in any case “Sing aloud” is the psalm of the day, either because it was an ordinary Thursday or because it was Rosh HaShana. However, there is no proof from here that in all uncertain cases they would recite the psalm for an ordinary weekday, as it is possible that they did not recite any psalm at all.

תניא רבי יהודה אומר משום רבי עקיבא בראשון מה היו אומרים לה׳ הארץ ומלואה על שם שקנה והקנה ושליט בעולמו

§ The Gemara expands on the topic of the daily psalms recited by the Levites. It is taught in a baraita that Rabbi Yehuda said in the name of Rabbi Akiva: On the first day of the week, Sunday, what psalm would the Levites recite? The psalm beginning with the phrase: “The earth is the Lord’s, and its fullness” (Psalms 24:1), in commemoration of the first day of Creation, because on that day He acquired the world and transferred it to man, and He was the only ruler in His world, as the angels were not created until the second day.

בשני מה היו אומרים גדול ה׳ ומהולל מאד על שם שחילק מעשיו ומלך עליהן

On the second day of the week what psalm would the Levites recite? The psalm that begins: “Great is the Lord, and highly to be praised in the city of our God, His sacred mountain” (Psalms 48:2). This is because on the second day of Creation He separated His works, dividing between the upper waters and the lower waters, and ruled over them as King; and this psalm speaks of Jerusalem as “The city of a great King” (Psalms 48:3).

בשלישי היו אומרים אלהים נצב בעדת אל על שם שגילה ארץ בחכמתו והכין תבל לעדתו ברביעי היו אומרים אל נקמות ה׳ על שם שברא חמה ולבנה ועתיד ליפרע מעובדיהן

On the third day of the week they would recite the psalm beginning: “God stands in the congregation of God” (Psalms 82:1), because on the third day of Creation He revealed the land in His wisdom and thereby prepared the world for His assembly that could now live on the dry land. On the fourth day of the week they would recite the psalm beginning: “O Lord God, to Whom vengeance belongs” (Psalms 94:1), because on the fourth day of Creation He created the sun and the moon, and in the future He will punish and take vengeance upon those who worship them.

בחמישי היו אומרים הרנינו לאלהים עוזנו על שם שברא עופות ודגים לשבח לשמו בששי היו אומרים ה׳ מלך גאות לבש על שם שגמר מלאכתו ומלך עליהן בשביעי היו אומרים מזמור שיר ליום השבת ליום שכולו שבת

On the fifth day of the week the Levites would recite the psalm beginning: “Sing aloud to God our strength” (Psalms 81:2), because on the fifth day of Creation He created birds and fish to praise His name. On the sixth day of the week they would recite the psalm beginning: “The Lord reigns, He is clothed with majesty” (Psalms 93:1), because on that day He completed His labor and ruled over all of creation in full glory. On the seventh day of the week, Shabbat, they would recite the psalm beginning: “A psalm, a song for the day of Shabbat” (Psalms 92:1), as the future world will be a day that is all Shabbat.

אמר רבי נחמיה מה ראו חכמים לחלק בין הפרקים הללו אלא בראשון שקנה והקנה ושליט בעולמו בשני שחילק מעשיו ומלך עליהם בשלישי שגילה ארץ בחכמתו והכין תבל לעדתו

Rabbi Neḥemya said: What did the Sages see that led them to distinguish between these chapters, as they interpret the psalms recited on the six weekdays as referring to the past, whereas the psalm recited on Shabbat is referring to the future. Rather, all of the psalms refer to the past. The first six are as explained above: On the first day, the reason is that He acquired the world and transferred it to man, and He was the only ruler in His world; on the second day, the reason is that He separated His works and ruled over them as King; on the third day, the reason is that He revealed the land in His wisdom and thereby prepared the world for His assembly.

ברביעי שברא חמה ולבנה ועתיד ליפרע מעובדיהן בחמישי שברא עופות ודגים לשבח לשמו בששי שגמר מלאכתו ומלך עליהם בשביעי על שם ששבת

On the fourth day, the reason is that He created the sun and the moon, and in the future He will punish those who worship them; on the fifth day, the reason is that He created birds and fish to praise His name; on the sixth day, the reason is that He completed His labor and ruled over all of creation. However, on the seventh day, the reason is that He rested from His work, as the phrase “A psalm, a song for the day of Shabbat” is referring to the first Shabbat of Creation.

וקמיפלגי בדרב קטינא דאמר רב קטינא שיתא אלפי שני הוה עלמא וחד חרוב שנאמר ונשגב ה׳ לבדו ביום ההוא אמר אביי תרי חרוב שנאמר יחיינו מיומים

The Gemara comments: And these tanna’im disagree with regard to a statement of Rav Ketina, as Rav Ketina said: The world will exist for six thousand years, and for one thousand years it will be destroyed, as it is stated: “And the Lord alone shall be exalted on that day” (Isaiah 2:11), and one day for God is a thousand years, as indicated in the verse: “For a thousand years in Your sight are but as yesterday when it is past” (Psalms 90:4). Rav Ketina’s statement is in accordance with the opinion of Rabbi Akiva. Conversely, Abaye said: The world will be destroyed for two thousand years, as it is stated: “After two days He will revive us” (Hosea 6:2). According to the opinion of Abaye that the destruction will be for two days, there is no connection between the future world and the day of Shabbat, which is only one day.

במוספי דשבתא מה היו אומרים אמר רב ענן בר רבא אמר רב הזיו לך

§ The Gemara further asks: When it came to the additional offerings of Shabbat, what would the Levites recite? Rav Anan bar Rava said that Rav said: They would recite in accordance with the mnemonic hei, zayin, yod, vav, lamed, kaf. They would divide the song of Ha’azinu into six sections, each of which began with a letter of the mnemonic: “Give ear [ha’azinu], you heavens” (Deuteronomy 32:1); “Remember [zekhor] the days of old” (Deuteronomy 32:7); “He made him ride [yarkivehu] on the high places of the earth” (Deuteronomy 32:13); “The Lord saw it [vayar] and spurned” (Deuteronomy 32:19); “Were it not [lulei] that I dread the enemy’s provocation” (Deuteronomy 32:27); “For [ki] the Lord will judge His people” (Deuteronomy 32:36).

ואמר רב חנן בר רבא אמר רב כדרך שחלוקים כאן כך חלוקין בבית הכנסת

And Rav Ḥanan bar Rava said that Rav said: In the manner that the verses of the song of Ha’azinu are divided here for the recitation of the additional offerings of Shabbat in the Temple, so too are they divided when they are read in the synagogue on Shabbat.

במנחתא דשבתא מה היו אומרים אמר רבי יוחנן אז ישיר ומי כמוך ואז ישיר

The Gemara asks another question: When it came to the daily afternoon offering on Shabbat, what would the Levites recite? Rabbi Yoḥanan said: “Then sang Moses” (Exodus 15:1), and: “Who is like You” (Exodus 15:11), the two halves of the Song of the Sea, and: “Then Israel sang this song” (Numbers 21:17), the entire Song of the Well.

איבעיא להו הני כולהו בחד שבתא אמרי להו או דלמא כל שבתא ושבתא אמרי חד תא שמע דתניא אמר רבי יוסי עד שהראשונה אומרת אחת שניה חוזרת שתים שמע מינה כל שבתא ושבתא אמרי חד שמע מינה

A dilemma was raised before the Sages: Does one recite all these sections of the song of Ha’azinu on each Shabbat, or perhaps on each and every Shabbat they would recite one section? The Gemara suggests: Come and hear, as it is taught in a baraita that Rabbi Yosei said: By the time that those who recite the first set, i.e., the verses for the additional offerings brought on Shabbat, recite it once, those who recite the second set, for the daily afternoon offering, would repeat their cycle twice, as the first set was comprised of six sections, whereas the second set included only three sections. Learn from here that each and every Shabbat they would recite only one section. The Gemara concludes: Indeed, learn from here that this is correct.

אמר רב יהודה בר אידי אמר רבי יוחנן עשר מסעות נסעה שכינה מקראי וכנגדן גלתה סנהדרין מגמרא

§ Rav Yehuda bar Idi said that Rabbi Yoḥanan said: The Divine Presence traveled ten journeys, i.e., it left the Temple and Eretz Yisrael in ten stages at the time of the destruction of the First Temple, as derived from verses. And corresponding to them the Sanhedrin was exiled in ten stages at the end of the Second Temple period and after the destruction of the Temple, and this is known from tradition.

עשר מסעות נסעה שכינה מקראי מכפרת לכרוב ומכרוב לכרוב ומכרוב למפתן וממפתן לחצר ומחצר למזבח וממזבח לגג ומגג לחומה ומחומה לעיר ומעיר להר ומהר למדבר וממדבר עלתה וישבה במקומה שנאמר אלך אשובה אל מקומי

The Gemara elaborates. The Divine Presence traveled ten journeys, as derived from verses. The ten journeys are: From the Ark cover to the cherub; and from one cherub to the other cherub; and from the second cherub to the threshold of the Sanctuary; and from the threshold to the courtyard; and from the courtyard to the altar; and from the altar to the roof; and from the roof to the wall of the Temple Mount; and from the wall to the city; and from the city to a mountain close to Jerusalem; and from that mountain to the wilderness; and from the wilderness it ascended and rested in its place in Heaven, isolated from humanity, as it is stated: “I will go and return to My place” (Hosea 5:15).

מכפורת לכרוב מכרוב לכרוב ומכרוב למפתן דכתיב ונועדתי לך שם ודברתי אתך מעל הכפורת וכתיב וירכב על כרוב ויעף וכתיב וכבוד אלהי ישראל נעלה מעל הכרוב אשר היה עליו אל מפתן הבית

The Gemara cites the sources for each of these stages: From the Ark cover the Divine Presence traveled to the cherub, and from one cherub to the other cherub, and from the second cherub to the threshold, as it is written with regard to Moses in the Tabernacle: “And there I will meet with you, and I will speak to you from above the Ark cover, from between the two cherubs” (Exodus 25:22). And it is written: “And He rode upon a cherub, and flew” (II Samuel 22:11), which indicates that the glory of the Divine Presence can rest upon one cherub. And it is written: “And the glory of the God of Israel had ascended from the cherub, on which it was, to the threshold of the House” (Ezekiel 9:3), i.e., the Divine Presence moved from the cherub to the threshold.

וממפתן לחצר דכתיב וימלא הבית את הענן והחצר מלאה את נגה כבוד ה׳ מחצר למזבח דכתיב ראיתי את ה׳ נצב על המזבח וממזבח לגג דכתיב טוב לשבת על פנת גג מגג לחומה דכתיב והנה ה׳ נצב על חומת אנך מחומה לעיר דכתיב קול ה׳ לעיר יקרא

And from the threshold of the Sanctuary the Divine Presence went to the courtyard, as it is written: “And the House was filled with the cloud and the courtyard was full of the brightness of the Lord’s glory” (Ezekiel 10:4). From the courtyard to the altar, as it is written: “I saw the Lord standing on the altar” (Amos 9:1). And from the altar to the roof, as it is written: “It is better to dwell in a corner of the roof than in a house together with a contentious woman” (Proverbs 21:9). From the roof to the wall, as it is written: “And behold, the Lord stood upon a wall made by a plumb line” (Amos 7:7). From the wall to the city, as it is written: “The Lord’s voice cries to the city” (Micah 6:9).

ומעיר להר דכתיב ויעל כבוד ה׳ מעל תוך העיר ויעמד על ההר אשר מקדם לעיר ומהר למדבר דכתיב טוב שבת בארץ מדבר וממדבר עלתה וישבה במקומה דכתיב אלך אשובה אל מקומי וגו׳

And from the city the Divine Presence arose to the mountain nearest the Sanctuary, i.e., the Mount of Olives, as it is written: “And the glory of the Lord went up from the midst of the city, and stood upon the mountain, which is on the east side of the city” (Ezekiel 11:23). And from the mountain to the wilderness, as it is written: “It is better to live in the wilderness than with a contentious and fretful woman” (Proverbs 21:19). And from the wilderness it ascended and rested in its place in Heaven, as it is written: “I will go and return to My place until they acknowledge their guilt” (Hosea 5:15).

אמר רבי יוחנן ששה חדשים נתעכבה שכינה לישראל במדבר שמא יחזרו בתשובה כיון שלא חזרו אמר תיפח עצמן שנאמר ועיני רשעים תכלינה ומנוס אבד מנהם ותקותם מפח נפש

Rabbi Yoḥanan said: For six months the Divine Presence lingered in the wilderness, waiting for the Jewish people, hoping that perhaps they would repent and it would be able to return to its place. When they did not repent, the Divine Presence said: Let them despair and be lost, as it is stated: “But the eyes of the wicked shall fail, and they shall have no way to flee, and their hope shall be the drooping of the soul” (Job 11:20). This concludes the discussion of the ten stages of the exile of the Divine Presence from the Holy of Holies.

וכנגדן גלתה סנהדרין מגמרא מלשכת הגזית לחנות ומחנות לירושלים ומירושלים ליבנה

And corresponding to these ten stages, the Sanhedrin was exiled in ten stages at the end of the Second Temple period and after the destruction of the Temple, and this is known from tradition: From the Chamber of Hewn Stone, its fixed seat in the Temple, to Ḥanut, literally, shop, a designated spot on the Temple Mount outside the Temple proper; and from Ḥanut to Jerusalem; and from Jerusalem to Yavne;

ומיבנה לאושא ומאושא ליבנה ומיבנה לאושא ומאושא לשפרעם ומשפרעם לבית שערים ומבית שערים לצפורי ומצפורי לטבריא וטבריא עמוקה מכולן שנאמר ושפלת מארץ תדברי

and from Yavne to Usha; and from Usha it returned to Yavne; and from Yavne it went back to Usha; and from Usha to Shefaram; and from Shefaram to Beit She’arim; and from Beit She’arim to Tzippori; and from Tzippori to Tiberias. And Tiberias is lower than all of them, as it is in the Jordan Valley. A verse alludes to these movements, as it is stated: “And brought down, you shall speak out of the ground” (Isaiah 29:4).

רבי אלעזר אומר שש גלות שנאמר כי השח יושבי מרום קריה נשגבה ישפילנה ישפילה עד ארץ יגיענה עד עפר אמר רבי יוחנן ומשם עתידין ליגאל שנאמר התנערי מעפר קומי שבי

Rabbi Elazar says: There are six exiles, if you count only the places, not the number of journeys, and a different verse alludes to this, as it is stated: “For He has brought down those who dwell high, the lofty city laying it low, laying it low, to the ground, bringing it to the dust” (Isaiah 26:5). This verse mentions six expressions of lowering: Brought down, laying it low, laying it low, to the ground, bringing it, and to the dust. Rabbi Yoḥanan said: And from there, i.e., from their lowest place of descent, they are destined to be redeemed in the future, as it is stated: “Shake yourself from the dust, arise, sit, Jerusalem” (Isaiah 52:2).

מתני׳ אמר רבי יהושע בן קרחה ועוד זאת התקין רבן יוחנן בן זכאי שאפילו ראש בית דין בכל מקום שלא יהו העדים הולכין אלא למקום הועד

MISHNA: Rabbi Yehoshua ben Korḥa said: And this, too, Rabban Yoḥanan ben Zakkai instituted, that even if the head of the court of seventy-one is in any other place, not where the Great Sanhedrin is in session, the witnesses should nevertheless go only to the place where the Great Sanhedrin gathers to deliver testimony to determine the start of the month. Although the date of the month is dependent on the head of the Great Sanhedrin, as it is he who declares that the month is sanctified (see 24a), nevertheless, Rabban Yoḥanan ben Zakkai instituted that the members of the Great Sanhedrin may sanctify the month in the absence of the head of the court.

גמ׳ ההיא איתתא דאזמנוה לדינא קמיה דאמימר בנהרדעי אזל אמימר למחוזא ולא אזלה בתריה כתב פתיחא עילוה אמר ליה רב אשי לאמימר והא אנן תנן אפילו ראש בית דין בכל מקום שלא יהו העדים הולכין אלא למקום הועד

GEMARA: The Gemara relates: There was a certain woman who was called to judgment before Ameimar in Neharde’a. Ameimar temporarily went to Meḥoza, and she did not follow him to be judged there. He wrote a document of excommunication [petiḥa] concerning her, for disobeying the court. Rav Ashi said to Ameimar: Didn’t we learn in the mishna: Even if the head of the court of seventy-one is in any other place, the witnesses should go only to the place where the Great Sanhedrin gathers? This shows that one must appear in the court itself, rather than follow the head of the court.

אמר ליה הני מילי לענין עדות החדש דאם כן נמצאת מכשילן לעתיד לבא אבל הכא עבד לוה לאיש מלוה

Ameimar said to him: This applies only to testimony to determine the start of the month, for which it is necessary to have a fixed place. The reason is that if so, if the witnesses come to court when the head of the court is absent and they will have to go to another place, consequently you will be obstructing them for future occasions, as they will consider it too much trouble and perhaps they will not come the next time. Therefore, the Sages said that these witnesses should go to the regular place where the Great Sanehdrin meets. However, here, with regard to monetary claims, the verse states: “The borrower is servant to the lender” (Proverbs 22:7), i.e., the defendant must act as is convenient to the claimant and the court.

תנו רבנן אין כהנים רשאין לעלות בסנדליהן לדוכן וזו אחד מתשע תקנות שהתקין רבן יוחנן בן זכאי שית דהאי פירקא וחדא דפירקא קמא

§ The Sages taught in a baraita: Priests are not allowed to ascend with their sandals to the platform to recite the Priestly Blessing in the synagogue. And this is one of the nine ordinances that Rabban Yoḥanan ben Zakkai instituted. Six are mentioned in this chapter: Sounding the shofar on Shabbat in Yavne, taking the lulav all seven days, the prohibition against eating new grain the entire day of waving, accepting testimony to determine the start of the month all day, having the witnesses to the New Moon go to the place of meeting, and reciting the Priestly Blessing without sandals. And one is stated in the first chapter, that the witnesses to the New Moon may desecrate Shabbat only for the months of Tishrei and Nisan.

ואידך דתניא גר שנתגייר בזמן הזה צריך שיפריש רובע לקינו אמר רבי שמעון בן אלעזר כבר נמנה עליה רבן יוחנן וביטלה מפני התקלה

And the other, as it is taught in a baraita: A convert who converts nowadays is required to set aside a quarter-shekel for his nest, i.e., his pair of doves. By Torah law a convert must bring two burnt-offerings of birds, in addition to his immersion and circumcision. After the destruction, it was instituted that he must set aside the value of two young pigeons in anticipation of the rebuilding of the Temple. Rabbi Shimon ben Elazar said: Rabban Yoḥanan ben Zakkai already assembled a majority who voted and rescinded the ordinance due to a potential mishap. If a convert is obligated to set aside money, someone might unwittingly use this money, thereby violating the prohibition against misuse of consecrated property.

ואידך פלוגתא דרב פפא ורב נחמן בר יצחק רב פפא אמר כרם רבעי רב נחמן בר יצחק אמר לשון של זהורית

And the other ordinance, the ninth, is the subject of a dispute between Rav Pappa and Rav Naḥman bar Yitzḥak. Rav Pappa said: The ordinance concerned the fruit of a fourth-year grapevine. Rav Naḥman bar Yitzḥak said: It was with regard to the strip of crimson wool.

רב פפא אמר כרם רבעי דתניא כרם רבעי היה עולה לירושלים מהלך יום לכל צד וזו היא תחומה אילת מן הצפון ועקרבת מן הדרום לוד מן המערב וירדן מן המזרח

The Gemara elaborates: Rav Pappa said that the ordinance is referring to the fruit of a fourth-year grapevine, as it is taught in a mishna (Beitza 5a): The fruit of a fourth-year grapevine has the status of second-tithe fruits, and therefore their owner would ascend to Jerusalem and eat the grapes there. If he is unable to do so, due to the distance involved or the weight of the load, he may redeem the fruits with money where he is, and later redeem that money for other fruits in Jerusalem. However, the Sages decreed that fruit from the environs of Jerusalem should not be redeemed; rather, the owners should bring the fruit itself to Jerusalem. The environs of Jerusalem for this purpose were defined as a day’s walk in each direction. And this is its boundary: Eilat to the north, Akrabat to the south, Lod to the west, and the Jordan river to the east.

ואמר עולא ואיתימא רבה בר עולא אמר רבי יוחנן מה טעם כדי לעטר שוקי ירושלים בפירות

And Ulla said, and some say Rabba bar Ulla said that Rabbi Yoḥanan said: For what reason did the Sages institute this ordinance, that one who lives near Jerusalem must bring his fruit there? In order to adorn the markets of Jerusalem with fruit, as this decree ensures that there is always an abundance of fruit in Jerusalem.

ותניא כרם רבעי היה לו לרבי אליעזר במזרח לוד בצד כפר טבי וביקש רבי אליעזר להפקירו לעניים

And it was further taught in a baraita: Rabbi Eliezer ben Hyrcanus, a student of Rabban Yoḥanan ben Zakkai, had a fourth-year grapevine located between Lod and Jerusalem, to the east of Lod alongside the village of Tavi. The vine was within the boundaries of Jerusalem for the purpose of this halakha. Rabbi Eliezer could not bring the fruit to the Temple, as the Temple had been destroyed, and Rabbi Eliezer sought to render the fruit ownerless in favor of the poor, for whom it would be worth the effort to bring the fruit to Jerusalem.

אמרו לו תלמידיו רבי כבר נמנו חבריך עליו והתירוהו מאן חבריך רבן יוחנן בן זכאי

His students said to him: Our teacher, there is no need to do so, as your colleagues have already voted on the matter and permitted it, as after the destruction of the Temple there is no need to adorn the markets of Jerusalem. The Gemara explains: Who are: Your colleagues? This is referring to Rabban Yoḥanan ben Zakkai.

רב נחמן בר יצחק אמר לשון של זהורית דתניא בראשונה היו קושרין לשון של זהורית על פתח אולם מבחוץ הלבין היו שמחין לא הלבין היו עצבין התקינו שיהו קושרין אותו על פתח אולם מבפנים

Rav Naḥman bar Yitzḥak said: The ordinance was with regard to the strip of crimson wool used on Yom Kippur. As it is taught in a baraita: At first they would tie a strip of crimson wool to the opening of the Entrance Hall of the Temple on the outside. If, after the sacrificing of the offerings and the sending of the scapegoat, the strip turned white, the people would rejoice, as this indicated that their sins had been atoned for. If it did not turn white they would be sad. When the Sages saw that people were overly distressed on Yom Kippur, they instituted that they should tie the strip of crimson wool to the opening of the Entrance Hall on the inside, where only a few could enter to see it.

ועדיין היו מציצין ורואין הלבין היו שמחין לא הלבין היו עצבין התקינו שיהו קושרין אותו חציו בסלע וחציו בין קרניו של שעיר המשתלח

But people would still peek and see it, and once again, if it turned white they would rejoice, and if it did not turn white they would be sad. Therefore, the Sages instituted that they should tie half of the strip to a rock near the place where the one who sent the scapegoat stood and half of it between the horns of the scapegoat, so that the people would not know what happened to the strip until after the conclusion of Yom Kippur. This ordinance was instituted by Rabban Yoḥanan ben Zakkai.

רב נחמן בר יצחק מאי טעמא לא אמר כרב פפא אמר לך אי סלקא דעתך רבן יוחנן בן זכאי חבריו דרבי אליעזר מי הוה רבו הוה ואידך כיון דתלמידים הוו לאו אורח ארעא למימרא ליה לרביה רבך

The Gemara explains this dispute: What is the reason that Rav Naḥman bar Yitzḥak did not state his opinion with regard to the ordinance in accordance with the opinion of Rav Pappa? He could have said to you: If it enters your mind to say that Rabban Yoḥanan ben Zakkai rescinded the ordinance of the fruit of fourth-year grapevines, was he one of Rabbi Eliezer’s colleagues, that the students would have referred to him in this manner? He was his teacher. Therefore, Rabbi Yoḥanan cannot be the one who instituted this ordinance. And the other, Rav Pappa, what would he respond to this? He would say that since they were Rabbi Eliezer’s students it is not proper conduct for one to say to his teacher: Your teacher. Therefore, they referred to Rabbi Yoḥanan as Rabbi Eliezer’s colleague.

ורב פפא מאי טעמא לא אמר כרב נחמן בר יצחק אמר לך אי סלקא דעתך רבן יוחנן בן זכאי בימי רבן יוחנן בן זכאי מי הוה לשון של זהורית והתניא כל שנותיו של רבן יוחנן בן זכאי מאה ועשרים שנה ארבעים שנה עסק בפרקמטיא ארבעים שנה למד ארבעים שנה לימד

The Gemara asks: And what is the reason that Rav Pappa did not state his opinion in accordance with the opinion of Rav Naḥman bar Yitzḥak? Rav Pappa could have said to you: If it enters your mind to say that this ordinance for Yom Kippur was instituted by Rabban Yoḥanan ben Zakkai, in the days of Rabban Yoḥanan ben Zakkai was there in fact a strip of crimson wool? Isn’t it taught in a baraita: All the years of Rabban Yoḥanan ben Zakkai’s life were 120 years: Forty years he was involved in business so that he could achieve financial independence and study Torah, forty years he studied Torah, and forty years he taught Torah.

ותניא ארבעים שנה קודם שנחרב הבית לא היה לשון של זהורית מלבין אלא מאדים ותנן משחרב הבית התקין רבן יוחנן בן זכאי ואידך אותם ארבעים שנה דלמד תלמיד יושב לפני רבו הוה ואמר מילתא ואסתבר טעמיה

And it is taught in a baraita: During the forty years before the Second Temple was destroyed the strip of crimson wool would not turn white; rather, it would turn a deeper shade of red. And we learned in the mishna: When the Temple was destroyed Rabban Yoḥanan ben Zakkai instituted his ordinances. This shows that Rabban Yoḥanan lived and taught Torah after the destruction. Therefore the ordinance of the crimson wool must have been made while Rabban Yoḥanan was still studying Torah, before he instituted any ordinances. The Gemara asks: And the other Sage, Rav Naḥman bar Yitzḥak, what would he answer? According to him, that ordinance was instituted during those forty years that he studied Torah. He was then a student sitting before his teacher, and he said a matter, i.e., he suggested this ordinance, and his reasoning made sense to the Sages,