Leviticus 14:21-22

21“If he is poor and cannot afford so much, then he shall take one male lamb for a trespass offering to be waved, to make atonement for him, plus one tenth of an ephah of fine flour mingled with oil for a grain offering, a pint of oil,

22two turtledoves or two young pigeons, such as he is able to afford. The one shall be a sin offering and the other a burnt offering.