Leviticus 14:1-5

Then the LORD spoke to Moses, saying, “This shall be the law of the leper in the day of his cleansing. Now he shall be brought to the priest, and the priest shall go out to the outside of the camp. Thus the priest shall look, and if the infection of leprosy has been healed in the leper, then the priest shall give orders to take two live clean birds and cedar wood and a scarlet string and hyssop for the one who is to be cleansed. The priest shall also give orders to slay the one bird in an earthenware vessel over running water.