Leviticus 14:31-33

³¹one as a sin offering and the other as a burnt offering, along with the grain offering. Then the priest will make atonement for the one who is to be cleansed before Yahweh.

³²This is the law for a person in whom there is an infectious skin disease, who is not able to afford the standard offerings for his cleansing.”

³³Yahweh spoke to Moses and to Aaron, saying,