Exodus 12:22

22Take a bunch of ahyssop and bdip it in the blood that is in the basin, and touch cthe lintel and the two doorposts with the blood that is in the basin. dNone of you shall go out of the door of his house until the morning.

Hebrews 9:19

19For when every commandment of the law had been declared by Moses to all the people, he took ethe blood of calves and goats, fwith water and scarlet wool and hyssop, and sprinkled both the book itself and all the people,
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