Talmud for Pesachim 139:3
ונאכלת לשני ימים וכו': מתני' דלא כבן תימא דתניא בן תימא אומר חגיגה הבאה עם הפסח הרי היא כפסח ואינה נאכלת אלא ליום ולילה וחגיגת חמשה עשר נאכלת לשני ימים ולילה אחד
The Scholars asked: According to the son of Tema, is it [the hagigah] eaten roast or is it not eaten roast? [Do we say,] When the Divine Law compared it to the Passover it was in respect of keeping it overnight, but not in respect of roast; or perhaps there is no difference? - Come and hear: On this night all [must be eaten] roast; and R. Hisda said: These are the words of the son of Tema. This proves it. <br>
Jerusalem Talmud Pesachim
It was stated: The festival offering which comes with the Pesaḥ is eaten first so that the Pesaḥ be eaten when one is satiated98Tosephta 5:3.. Why should the Pesaḥ not be eaten so one be satiated? Rebbi Yose ben Rebbi Bun in the name of Rebbi Jacob bar Dosay: Lest one come to break a bone99Babli 70a. Mekhilta dR. Ismael Bo 6 (ed. Horovitz-Rabin p. 20)..
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