출애굽기 13:8의 Halakhah

What does the evil [son] say? "'What is this worship to you?' (Exodus 12:26)" 'To you' and not 'to him.' And since he excluded himself from the collective, he denied a principle [of the Jewish faith]. And accordingly, you will blunt his teeth and say to him, "'For the sake of this did the Lord do [this] for me in my going out of Egypt' (Exodus 13:8)." 'For me' and not 'for him.' And if he had been there, he would not have been saved.

And [regarding] the one who doesn't know to ask, you will open [the conversation] for him. As it is stated (Exodus 13:8), "And you will speak to your son on that day saying, for the sake of this, did the Lord do [this] for me in my going out of Egypt." "And you will speak to your your son " - it could be from Rosh Chodesh [that one would have to discuss the Exodus. However] we learn [otherwise, since] it is stated, "on that day." If it is [written] "on that day," it could be from while it is still day [before the night of the fifteenth of Nissan. However] we learn [otherwise, since] it is stated, "for the sake of this." I didn't say [this] except [that it be observed] when [this] matsa and bitter herbs are resting in front of you [meaning, on the night of the fifteenth].

And in each and every generation, a person is obligated to show himself as if he left Egypt, as it is stated (Exodus 13:8); "For the sake of this, did the Lord do [this] for me in my going out of Egypt." Not only our ancestors did the Holy One, blessed be He, redeem, but rather also us [together] with them did He redeem, as it is stated (Deuteronomy 6:23); "And He took us out from there, in order to bring us in, to give us the land which He swore unto our fathers."

The commandment to recount the exodus from Egypt: To tell about the exodus from Egypt on the night of the fifteenth of Nissan (the first night of Pesach) - each person according to his own power of expression - to laud and to praise God, may He be blessed, for all the miracles He performed for us there, as it is stated (Exodus 13:8), "And you shall tell your son." [Although the verse doesn't specify when this should be done,] the Sages have already explained (Mekhilta d'Rabbi Yishmael 13:8) that this commandment of retelling is on the night of the fifteenth of Nissan - which is the time of the eating of the matsah. And that which the verse states, "[and you shall tell] your son," [does not mean] exclusively one's son; but rather even with any creature (Pesachim 116a).