21 And Moses called for the elders of Israel, and said unto them, Draw out and take for yourselves lambs according to your families, and kill the passover sacrifice.

22 And ye shall take a bunch of hyssop, and dip in the blood that is in the basin, and strike the lintel and the two sideposts with the blood that is in the basin; and none of you shall go out frown the door of his house until the morning.

23 And the Lord will pass through to smite the Egyptians; and when he seeth the blood upon the lintel, and on the two sideposts, the Lord will pass over the door, and will not suffer the destroyer to come in unto your houses to smite.