Exodus 12:21-28

21Then 1Moses called for all the elders of Israel and said to them, “2Go and 3take for yourselves 4lambs according to your families, and slay 5the Passover lamb. 226You shall take a bunch of hyssop and dip it in the blood which is in the basin, and 7apply some of the blood that is in the basin to the lintel and the two doorposts; and none of you shall go outside the door of his house until morning. 23For 8the Lord will pass through to smite the Egyptians; and when He sees the blood on the lintel and on the two doorposts, the Lord will pass over the door and will 9not allow the 10destroyer to come in to your houses to smite you. 24And 11you shall observe this event as an ordinance for you and your children forever. 25When you enter the land which the Lord will give you, as He has 12promised, you shall observe this 13rite. 2614And when your children say to you, ‘15What does this rite mean to you?’ 27you shall say, ‘It is a Passover sacrifice to 16the Lord 17who passed over the houses of the sons of Israel in Egypt when He smote the Egyptians, but 18spared our homes.’” 19And the people bowed low and worshiped.

28Then the sons of Israel went and did so; just as the Lord had commanded Moses and Aaron, so they did.