Leviticus 14:50-57

50and he shall slaughter the one bird in an earthenware vessel over 1running water. 51Then he shall take the cedar wood, the 2hyssop, and the 3scarlet string, with the live bird, and dip them in the blood of the slaughtered bird as well as in the 4running water, and sprinkle the house seven times. 52So he shall cleanse the house with the blood of the bird and with the 5running water, along with the live bird, the cedar wood, the hyssop, and the 6scarlet string. 53However, he shall let the live bird go free outside the city into the open field. So he shall make atonement for the house, and it will be clean.”

54This is the law for any spot of leprosy--even for a 7scale, 55and for the 8leprous garment or house, 56and 9for a swelling, for a scab, and for a bright spot-- 57to teach 10when they are unclean and 11when they are clean. This is the law of leprosy.