Exodus 12:21-23 New American Bible (Revised Edition) (NABRE)
Promulgation of the Passover. 21 Moses summoned all the elders of Israel and said to them, “Go and procure lambs for your families, and slaughter the Passover victims. 22 Then take a bunch of hyssop,[a] and dipping it in the blood that is in the basin, apply some of this blood to the lintel and the two doorposts. And none of you shall go outdoors until morning. 23 For when the Lord goes by to strike down the Egyptians, seeing the blood on the lintel and the two doorposts, the Lord will pass over that door and not let the destroyer come into your houses to strike you down.