21 So then Moses called for all the elders of Israel, and said unto them,Proceed and take for yourselves one of the flock according to your families, and slay the passover.
22 Then shall ye take a bunch of hyssop, and dip it in the blood which is in the basin, and strike the upper beam and the two door-posts, with the blood which is in the basin,and, ye, shall not go forth any man out of the entrance of his house, until morning,
23 And Yahweh will pass along to plague the Egyptians, and when he beholdeth the blood upon the upper beam and upon the two door-pests, then will Yahweh pass over the entrance, and not suffer the destroyer to enter into your houses to inflict on you the plague.