Leviticus 14:30–32

30 He is to then sacrifice one type of what he can afford, either the turtledoves or young pigeons, 31 one as a sin offering and the other as a burnt offering, sacrificing what he can afford together with the grain offering. In this way the priest will make atonement before the Lord for the one to be cleansed. 32 This is the law for someone who hasA a skin disease and cannot afford the cost of his cleansing.”