Leviticus 5:7; Leviticus 5:11

7 “ ‘Anyone who cannot afford a lamb is to bring two doves or two young pigeons to the LORD as a penalty for their sin—one for a sin offering and the other for a burnt offering.

11 “ ‘If, however, they cannot afford two doves or two young pigeons, they are to bring as an offering for their sin a tenth of an ephah of the finest flour for a sin offering. They must not put olive oil or incense on it, because it is a sin offering.