Leviticus 5:10-12 Living Bible (TLB)
10 He shall offer the second bird as a burnt offering, following the customary procedures that have been set forth; so the priest shall make atonement for him concerning his sin, and he shall be forgiven.
11 “If he is too poor to bring turtledoves or young pigeons as his sin offering, then he shall bring a tenth of a bushel of fine flour. He must not mix it with olive oil or put any incense on it because it is a sin offering. 12 He shall bring it to the priest, and the priest shall take out a handful as a representative portion and burn it on the altar just as any other offering to Jehovah made by fire; this shall be his sin offering.