Exodus 12:21-23

Amplified Bible, Classic Edition

²¹ Then Moses called for all the elders of Israel, and said to them, Go forth, select and take a lamb according to your families and kill the Passover [lamb].

²² And you shall take a bunch of hyssop, dip it in the blood in the basin, and touch the lintel above the door and the two side posts with the blood; and none of you shall go out of his house until morning.

²³ For the Lord will pass through to slay the Egyptians; and when He sees the blood upon the lintel and the two side posts, the Lord will pass over the door and will not allow the destroyer to come into your houses to slay you.