Leviticus 14:50-57

50and shall kill one of the birds in an earthenware vessel over fresh water

51and shall take the cedarwood and the hyssop and the scarlet yarn, along with the live bird, and dip them in the blood of the bird that was killed and in the fresh water and sprinkle the house seven times.

52Thus he shall cleanse the house with the blood of the bird and with the fresh water and with the live bird and with the cedarwood and hyssop and scarlet yarn.

53And he shall let the live bird go out of the city into the open country. So he shall make atonement for the house, and it shall be clean."

54This is the law for any case of leprous disease: for an itch,

55for leprous disease in a garment or in a house,

56and for a swelling or an eruption or a spot,

57to show when it is unclean and when it is clean. This is the law for leprous disease.