Leviticus 5:7, 11

“But if you cannot afford to bring a sheep, you may bring to the LORD two turtledoves or two young pigeons as the penalty for your sin. One of the birds will be for a sin offering, and the other for a burnt offering.

“If you cannot afford to bring two turtledoves or two young pigeons, you may bring two quarts of choice flour for your sin offering. Since it is an offering for sin, you must not moisten it with olive oil or put any frankincense on it.