Leviticus 14:21-22

21But if he be poor, and his hand be not able to get it, then he shall take one lamb for a trespass-offering, for a wave-offering, to make atonement for him; and one tenth part of fine flour mingled with oil for an oblation; and a log of oil,

22and two turtle-doves, or two young pigeons, as his hand may be able to get: the one shall be a sin-offering, and the other a burnt-offering.