Leviticus 14:49-53

49And he shall take to cleanse the house two birds, and cedar-wood, and scarlet, and hyssop: 50and he shall kill one of the birds in an earthen vessel over running water: 51and he shall take the cedar-wood, and the hyssop, and the scarlet, and the living bird, and dip them in the blood of the slain bird, and in the running water, and sprinkle the house seven times: 52and he shall cleanse the house with the blood of the bird, and with the running water, and with the living bird, and with the cedar-wood, and with the hyssop, and with the scarlet: 53but he shall let go the living bird out of the city into the open field: so shall he make atonement for the house; and it shall be clean.