Leviticus 14:2-5

2This shall be the law of the leper in the day of his cleansing: he shall be brought unto the priest,

3and the priest shall go out of the camp; and when the priest looketh, and behold, the sore of leprosy is healed in the leper,

4then shall the priest command to take for him that is to be cleansed two clean living birds, and cedar-wood, and scarlet, and hyssop.

5And the priest shall command that one bird be killed in an earthen vessel over running water: