Leviticus 14:49-52

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.