Exodus 12:7; Exodus 12:22; Exodus 12:23; Exodus 21:6

Exodus 12:7

7 'Moreover, they shall take some of the blood and put it on the two doorposts and on the lintel of the houses in which they eat it.

Exodus 12:22

22 "You shall take a bunch of hyssop and dip it in the blood which is in the basin, and apply 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.

Exodus 12:23

23 "For the 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 not allow the destroyer to come in to your houses to smite you.

Exodus 21:6

6 then his master shall bring him to God, then he shall bring him to the door or the doorpost. And his master shall pierce his ear with an awl; and he shall serve him permanently.