Leviticus 14:31-33

³¹And of these, he will give one for a sin-offering and one for a burned offering, with the meal offering; and the priest will take away the sin of him who is to be made clean before the Lord.

³²This is the law for the man who has the disease of the leper on him, and who is not able to get that which is necessary for making himself clean.

³³And the Lord said to Moses and Aaron,