Exodus 12:28

²⁶And it shall come to pass, if your sons say to you, What is this service?

²⁷that ye shall say to them, This Passover is a sacrifice to the Lord, as he defended the houses of the children of Israel in Egypt, when he smote the Egyptians, but delivered our houses.

— Exodus 12:28 —

²⁹And it came to pass at midnight that the Lord smote all the firstborn in the land of Egypt, from the firstborn of Pharaoh that sat on the throne, to the firstborn of the captive maid in the dungeon, and the firstborn of all cattle.

³⁰And Pharaoh rose up by night, and his servants, and all the Egyptians; and there was a great cry in all the land of Egypt, for there was not a house in which there was not one dead.