Liturgy על שמות 13:8

"And he went down to Egypt" - helpless on account of the word [in which God told Avraham that his descendants would have to go into exile]. "And he resided there" - [this] teaches that Ya'akov, our father, didn't go down to settle in Egypt, but rather [only] to reside there, as it is stated (Genesis 47:4), "And they said to Pharaoh, 'To reside in the land have we come, since there is not enough pasture for your servant's flocks, since the famine is heavy in the land of Canaan, and now please grant that your servants should dwell in the Land of Goshen.'"

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.' 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."

In each and every generation, a person is obligated to see himself as if he left Egypt, as it is stated (Exodus 13:8); "And you shall explain to your son on that day: 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."