Exodus 12:26-27

²⁶ And it shall come to pass, when your children shall say unto you, What mean ye by this service?

²⁷ That ye shall say, It is the sacrifice of YAHUAH’s passover, who passed over the houses of the children of Israel in Egypt, when he smote the Egyptians, and delivered our houses. And the people bowed the head and worshipped.