Exodus 12:27-29

New Revised Standard Version, Anglicised Catholic Edition

²⁷ you shall say, “It is the passover sacrifice to the Lord, for he passed over the houses of the Israelites in Egypt, when he struck down the Egyptians but spared our houses.”’ And the people bowed down and worshipped.

²⁸ The Israelites went and did just as the Lord had commanded Moses and Aaron.

The Tenth Plague: Death of the Firstborn

²⁹ At midnight the Lord struck down all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the prisoner who was in the dungeon, and all the firstborn of the livestock.