Leviticus 14:1-5

The LORD said to Moses, “These are the regulations for any diseased person at the time of their ceremonial cleansing, when they are brought to the priest: The priest is to go outside the camp and examine them. If they have been healed of their defiling skin disease, the priest shall order that two live clean birds and some cedar wood, scarlet yarn and hyssop be brought for the person to be cleansed. Then the priest shall order that one of the birds be killed over fresh water in a clay pot.