Leviticus 14:1-7

Then ADONAI spoke to Moses, saying: “This is the Torah of the one with tza'arat in the day of his cleansing. He shall be brought to the kohen, and the kohen is to go to the outside of the camp. The kohen is to examine him, and behold, if the mark of tza'arat is healed in one with tza'arat, then the kohen is to command that two clean living birds, cedar wood, scarlet and hyssop be brought for the one being cleansed. The kohen shall command them to kill one of the birds in a clay pot over living water. As for the living bird, he is to take it, the cedar wood, the scarlet and the hyssop, and dip them with the living bird into the blood of the bird that was killed over the living water. He is to sprinkle on the one being cleansed from the tza'arat seven times and pronounce him clean, then release the living bird over the open field.