Leviticus 14:4-7

14:4 then the priest will command that two live clean birds, a piece of cedar wood, a scrap of crimson fabric, and some twigs of hyssop be taken up for the one being cleansed. 14:5 The priest will then command that one bird be slaughtered into a clay vessel over fresh water. 14:6 Then he is to take the live bird along with the piece of cedar wood, the scrap of crimson fabric, and the twigs of hyssop, and he is to dip them and the live bird in the blood of the bird slaughtered over the fresh water, 14:7 and sprinkle it seven times on the one being cleansed from the disease, pronounce him clean, and send the live bird away over the open countryside.

Leviticus 14:49-52

14:49 Then he is to take two birds, a piece of cedar wood, a scrap of crimson fabric, and some twigs of hyssop to decontaminate the house, 14:50 and he is to slaughter one bird into a clay vessel over fresh water. 14:51 He must then take the piece of cedar wood, the twigs of hyssop, the scrap of crimson fabric, and the live bird, and dip them in the blood of the slaughtered bird and in the fresh water, and sprinkle the house seven times. 14:52 So he is to decontaminate the house with the blood of the bird, the fresh water, the live bird, the piece of cedar wood, the twigs of hyssop, and the scrap of crimson fabric,

Numbers 19:18-20

19:18 Then a ceremonially clean person must take hyssop, dip it in the water, and sprinkle it on the tent, on all its furnishings, and on the people who were there, or on the one who touched a bone, or one killed, or one who died, or a grave. 19:19 And the clean person must sprinkle the unclean on the third day and on the seventh day; and on the seventh day he must purify him, and then he must wash his clothes, and bathe in water, and he will be clean in the evening. 19:20 But the man who is unclean and does not purify himself, that person must be cut off from among the community, because he has polluted the sanctuary of the Lord; the water of purification was not sprinkled on him, so he is unclean.

Hebrews 9:19

9:19 For when Moses had spoken every command to all the people according to the law, he took the blood of calves and goats with water and scarlet wool and hyssop and sprinkled both the book itself and all the people,