מַעֲשֶׂה בְּרַבִּי אֱלִיעֶזֶר וְרַבִּי יְהוֹשֻׁעַ וְרַבִּי אֶלְעָזָר בֶּן־עֲזַרְיָה וְרַבִּי עֲקִיבָא וְרַבִּי טַרְפוֹן שֶׁהָיוּ מְסֻבִּין בִּבְנֵי־בְרַק וְהָיוּ מְסַפְּרִים בִּיצִיאַת מִצְרַיִם כָּל־אוֹתוֹ הַלַּיְלָה, עַד שֶׁבָּאוּ תַלְמִידֵיהֶם וְאָמְרוּ לָהֶם רַבּוֹתֵינוּ הִגִּיעַ זְמַן קְרִיאַת שְׁמַע שֶׁל שַׁחֲרִית.
It happened once [on Pesach] that Rabbi Eliezer, Rabbi Yehoshua, Rabbi Elazar ben Azariah, Rabbi Akiva and Rabbi Tarfon were reclining in Bnei Brak and were telling the story of the exodus from Egypt that whole night, until their students came and said to them, "The time of [reciting] the morning Shema has arrived."
עֲבָדִים הָיִינוּ לְפַרְעֹה בְּמִצְרָיִם, וַיּוֹצִיאֵנוּ ה' אֱלֹקֵינוּ מִשָּׁם בְּיָד חֲזָקָה וּבִזְרֹעַ נְטוּיָה. וְאִלּוּ לֹא הוֹצִיא הַקָּדוֹשׁ בָּרוּךְ הוּא אֶת אֲבוֹתֵינוּ מִמִּצְרָיִם, הֲרֵי אָנוּ וּבָנֵינוּ וּבְנֵי בָנֵינוּ מְשֻׁעְבָּדִים הָיִינוּ לְפַרְעֹה בְּמִצְרָיִם. וַאֲפִילוּ כֻּלָּנוּ חֲכָמִים כֻּלָּנוּ נְבוֹנִים כֻּלָּנוּ זְקֵנִים כֻּלָּנוּ יוֹדְעִים אֶת הַתּוֹרָה מִצְוָה עָלֵינוּ לְסַפֵּר בִּיצִיאַת מִצְרָיִם. וְכָל הַמַּרְבֶּה לְסַפֵּר בִּיצִיאַת מִצְרַיִם הֲרֵי זֶה מְשֻׁבָּח.
We were slaves to Pharaoh in the land of Egypt. And the Lord, our God, took us out from there with a strong hand and an outstretched forearm. And if the Holy One, blessed be He, had not taken our ancestors from Egypt, behold we and our children and our children's children would [all] be enslaved to Pharaoh in Egypt. And even if we were all sages, all discerning, all elders, all knowledgeable about the Torah, it would be a commandment upon us to tell the story of the exodus from Egypt. And anyone who adds [and spends extra time] in telling the story of the exodus from Egypt, behold he is praiseworthy.
(יב) מעשה ברבן גמליאל וזקנים שהיו מסובין בבית ביתוס בן זונין בלוד והיו [עוסקין בהלכות הפסח] כל הלילה עד קרות הגבר, הגביהו מלפניהם ונועדו והלכו [להן] לבית המדרש.
(12) Once, Rabban Gamliel and the elders were reclining in the house of Boethus ben Zonin in Lod, and they were occupied in studying the laws of Pesach all that night, until the cock crowed. They lifted the table, made themselves ready and went to the house of study [to pray].
א"ל ריש גלותא לרב ששת אע"ג דרבנן קשישי אתון פרסאי בצרכי סעודה בקיאי מינייכו.
בזמן שהן שתי מטות: גדול מסב בראש ושני לו למעלה הימנו. ובזמן שהם שלש: גדול מסב באמצע, שני לו למעלה הימנו. שלישי לו למטה הימנו.
[...]
אמר רב ששת אנא מתניתא ידענא דתניא: כיצד סדר הסבה?
בזמן שהן שתי מטות, גדול מסב בראש ושני לו למטה הימנו.
בזמן שהן שלש מטות, גדול מסב בראש, שני לו למעלה הימנו, שלישי לו למטה הימנו.
On the topic of meals, the Gemara relates the following: The Exilarch said to Rav Sheshet: Although you are elderly Sages, the Persians are more expert than you with regard to the required etiquette at meals. The Persian custom is that when there are two divans on which they would recline, the greater of the two people reclines first and the person second to him in importance reclines on the divan above him, alongside his head. When there are three divans, the greatest of the three reclines on the middle divan, the one second to him in importance reclines on the divan above him, and the one third to him in importance reclines on the divan below the greatest of the three.
[...]
Rav Sheshet said: In terms of conduct at a meal, I know a baraita, as it was taught: What is the order of reclining? When there are two divans on which they would recline, the greater of the two people reclines first, and the person second to him in importance reclines on the divan below him. When there are three divans, the greatest of the three reclines first, on the middle divan, the one second to him in importance reclines on the divan above him, and the one third to him in importance reclines on the divan below the greatest of the three.
תנו רבנן פעם אחת חל ראש השנה להיות בשבת [והיו כל הערים מתכנסין]. אמר להם רבן יוחנן בן זכאי לבני בתירה: נתקע. אמרו לו: נדון. אמר להם: נתקע ואחר כך נדון. לאחר שתקעו אמרו לו: נדון. אמר להם :כבר נשמעה קרן ביבנה ואין משיבין לאחר מעשה:
Rabban Yoḥanan ben Zakkai said to the sons of Beteira, who were the leading halakhic authorities of the generation: Let us sound the shofar, as in the Temple. They said to him: Let us discuss whether or not this is permitted. He said to them: First let us sound it, and afterward, when there is time, let us discuss the matter. After they sounded the shofar, the sons of Beteira said to Rabban Yoḥanan ben Zakkai: Let us now discuss the issue. He said to them: The horn has already been heard in Yavne, and one does not refute a ruling after action has already been taken. There is no point in discussing the matter, as it would be inappropriate to say that the community acted erroneously after the fact.