Leviticus 14:48-53

“But if the priest comes and looks, and if the disease has not spread in the house after the house was plastered, then the priest shall pronounce the house clean, for the disease is healed. And for the cleansing of the house he shall take two small birds, with cedarwood and scarlet yarn and hyssop, and shall kill one of the birds in an earthenware vessel over fresh water and 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. Thus 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. And 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.”