Exodus 12:27-29

Darby Translation

²⁷ that ye shall say, It is a sacrifice of passover to Jehovah, 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 their heads and worshipped.

²⁸ And the children of Israel went away, and did as Jehovah had commanded Moses and Aaron; so did they.

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