21 Then Moses called together all the elders of Israel and told them, "Go immediately and choose a lamb for each of your families, and kill the Passover lamb. 22 Get a bunch of hyssop, dip it into the blood in the basin, and put some on the top and sides of the doorframe. None of you are to go out through door of the house until morning.

23 When the Lord passes through to punish the Egyptians, he will see the blood on the top and sides of the doorframe. He will pass over the door, and he will not allow the destroyer to enter your houses and kill you.