Leviticus 14:4

2“This shall be the law of the leper in the day of his cleansing: He shall be brought to the priest,

3and the priest shall go out of the camp. The priest shall examine him. Behold, if the plague of leprosy is healed in the leper,

4then the priest shall command them to take for him who is to be cleansed two living clean birds, cedar wood, scarlet, and hyssop.

5The priest shall command them to kill one of the birds in an earthen vessel over running water.

6As for the living bird, he shall take it, the cedar wood, the scarlet, and the hyssop, and shall dip them and the living bird in the blood of the bird that was killed over the running water.