Talmud Bavli, Rosh Hashanah
Rosh Hashanah 25a
The Talmud's extended discussion of the Mishnah's account of Rabban Gamliel and Rabbi Yehoshua's dispute over the calendar, including Rabbi Akiva's and Rabbi Dosa ben Hyrcanus's involvement, and the philosophical grounding of why the Sanhedrin's authority overrides individual calculation.
אָמַר רַבִּי דּוֹסָא בֶּן הוֹרְכִּינָס: עֵדֵי שֶׁקֶר הֵן, הֵיאַךְ מְעִידִים עַל הָאִשָּׁה שֶׁיָּלְדָה וּלְמָחָר כְּרֵיסָהּ בֵּין שִׁינֶּיהָ? אָמַר לוֹ רַבִּי יְהוֹשֻׁעַ: רוֹאֶה אֲנִי אֶת דְּבָרֶיךָ. שָׁלַח לוֹ רַבָּן גַּמְלִיאֵל: גּוֹזְרַנִי עָלֶיךָ שֶׁתָּבֹא אֶצְלִי בְּמַקֶּלְךָ וּבִמְעוֹתֶיךָ בְּיוֹם הַכִּפּוּרִים שֶׁחָל לִהְיוֹת בְּחֶשְׁבּוֹנֶךָ. הָלַךְ וּמְצָאוֹ רַבִּי עֲקִיבָא מֵיצֵר, אָמַר לוֹ: יֵשׁ לִי לִלְמוֹד שֶׁכׇּל מַה שֶּׁעָשָׂה רַבָּן גַּמְלִיאֵל עָשׂוּי, שֶׁנֶּאֱמַר: ״אֵלֶּה מוֹעֲדֵי ה׳ מִקְרָאֵי קֹדֶשׁ אֲשֶׁר תִּקְרְאוּ אֹתָם״, בֵּין בִּזְמַנָּן בֵּין שֶׁלֹּא בִּזְמַנָּן — אֵין לִי מוֹעֲדוֹת אֶלָּא אֵלּוּ. בָּא לוֹ אֵצֶל רַבִּי דּוֹסָא בֶּן הוֹרְכִּינָס, אָמַר לוֹ: אִם בָּאִין אָנוּ לָדוּן אַחַר בֵּית דִּינוֹ שֶׁל רַבָּן גַּמְלִיאֵל, צְרִיכִין אָנוּ לָדוּן אַחַר כׇּל בֵּית דִּין וּבֵית דִּין שֶׁעָמַד מִימוֹת מֹשֶׁה וְעַד עַכְשָׁיו. שֶׁנֶּאֱמַר: ״וַיַּעַל מֹשֶׁה וְאַהֲרֹן נָדָב וַאֲבִיהוּא וְשִׁבְעִים מִזִּקְנֵי יִשְׂרָאֵל״, וְלָמָּה לֹא נִתְפָּרְשׁוּ שְׁמוֹתָן שֶׁל זְקֵנִים? אֶלָּא לְלַמֵּד שֶׁכׇּל שְׁלֹשָׁה וּשְׁלֹשָׁה שֶׁעָמְדוּ בֵּית דִּין עַל יִשְׂרָאֵל — הֲרֵי הוּא כְּבֵית דִּינוֹ שֶׁל מֹשֶׁה. נָטַל מַקְלוֹ וּמְעוֹתָיו בְּיָדוֹ, וְהָלַךְ לְיַבְנֶה אֵצֶל רַבָּן גַּמְלִיאֵל בַּיּוֹם שֶׁחָל יוֹם הַכִּפּוּרִים לִהְיוֹת בְּחֶשְׁבּוֹנוֹ. עָמַד רַבָּן גַּמְלִיאֵל וּנְשָׁקוֹ עַל רֹאשׁוֹ, אָמַר לוֹ: בּוֹא בְּשָׁלוֹם רַבִּי וְתַלְמִידִי! רַבִּי — בְּחׇכְמָה, וְתַלְמִידִי — שֶׁקִּבַּלְתָּ אֶת דְּבָרַי.
Rabbi Dosa ben Horkinas disagreed and said: They are false witnesses; how can witnesses testify that a woman gave birth and the next day her belly is between her teeth, i.e., she is obviously still pregnant? If the new moon was already visible at its anticipated time, how could it not be seen a day later? Rabbi Yehoshua said to him: I see the logic of your statement; the New Moon must be established a day later. Upon hearing that Rabbi Yehoshua had challenged his ruling, Rabban Gamliel sent a message to him: I decree against you that you must appear before me with your staff and with your money on the day on which Yom Kippur occurs according to your calculation; according to my calculation, that day is the eleventh of Tishrei, the day after Yom Kippur. Rabbi Akiva went and found Rabbi Yehoshua distressed that the head of the Great Sanhedrin was forcing him to desecrate the day that he maintained was Yom Kippur. In an attempt to console him, Rabbi Akiva said to Rabbi Yehoshua: I can learn from a verse that everything that Rabban Gamliel did in sanctifying the month is done, i.e., it is valid. As it is stated: “These are the appointed seasons of the Lord, sacred convocations, which you shall proclaim in their season” (Leviticus 23:4). This verse indicates that whether you have proclaimed them at their proper time or whether you have declared them not at their proper time, I have only these Festivals as established by the representatives of the Jewish people. Rabbi Yehoshua then came to Rabbi Dosa ben Horkinas, who said to him: If we come to debate and question the rulings of the court of Rabban Gamliel, we must debate and question the rulings of every court that has stood from the days of Moses until now. As it is stated: “Then Moses went up, and Aaron, Nadav and Avihu, and seventy of the Elders of Israel” (Exodus 24:9). But why were the names of these seventy Elders not specified? Rather, this comes to teach that every set of three judges that stands as a court over the Jewish people has the same status as the court of Moses. Since it is not revealed who sat on that court, apparently it is enough that they were official judges in a Jewish court. When Rabbi Yehoshua heard that even Rabbi Dosa ben Horkinas maintained that they must submit to Rabban Gamliel’s decision, he took his staff and his money in his hand, and went to Yavne to Rabban Gamliel on the day on which Yom Kippur occurred according to his own calculation. Upon seeing him, Rabban Gamliel stood up and kissed him on his head. He said to him: Come in peace, my teacher and my student. You are my teacher in wisdom, as Rabbi Yehoshua was wiser than anyone else in his generation, and you are my student, as you accepted my statement, despite your disagreement.
Why it matters — Provides the Talmudic analysis and broader context for the Rosh Hashanah confrontation, exploring the nature of rabbinic legal authority.