Liturgy על פסחים 231:11

From the beginning, our ancestors were idol worshipers. And now, the Place [of all] has brought us close to His worship, as it is stated (Joshua 24:2-4), "Yehoshua said to the whole people, so said the Lord, God of Israel, 'Over the river did your ancestors dwell from always, Terach the father of Avraham and the father of Nachor, and they worshiped other gods.

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.