Exodus 12:27-29

Amplified Bible

²⁷ you shall say, ‘It is the sacrifice of the Lord’s Passover, for He passed over the houses of the Israelites in Egypt when He struck the Egyptians, but spared our houses.’” And the people bowed [their heads] low and worshiped [God].

²⁸ Then the Israelites went and did [as they had been told]: just as the Lord had commanded Moses and Aaron, so they did.

²⁹ Now it happened at midnight that the Lord struck every 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 ^[a]dungeon, and all the firstborn of the cattle.