Leviticus 14:49-51

New Revised Standard Version Catholic Edition

⁴⁹ For the cleansing of the house he shall take two birds, with cedarwood and crimson yarn and hyssop, ⁵⁰ and shall slaughter one of the birds over fresh water in an earthen vessel, ⁵¹ and shall take the cedarwood and the hyssop and the crimson yarn, along with the living bird, and dip them in the blood of the slaughtered bird and the fresh water, and sprinkle the house seven times.