Leviticus 14:4-6

New Century Version

⁴ the priest will command that two living, clean birds, a piece of cedar wood, a piece of red string, and a hyssop plant be brought for cleansing the person with the skin disease.

⁵ “The priest must order one bird to be killed in a clay bowl containing fresh water. ⁶ Then he will take the living bird, the piece of cedar wood, the red string, and the hyssop; all these he will dip into the blood of the bird that was killed over the fresh water.