Leviticus 14:1-4

And Jehovah spake unto Moses, saying, This shall be the law of the leper in the day of his cleansing: he shall be brought unto the priest: and the priest shall go forth out of the camp; and the priest shall look; and, behold, if the plague of leprosy be healed in the leper, then shall the priest command to take for him that is to be cleansed two living clean birds, and cedar wood, and scarlet, and hyssop