Leviticus 12:8
8 And if she cannot afford a lamb, then she shall take xtwo turtledoves or two pigeons,1 yone for a burnt offering and the other for a sin offering. zAnd the priest shall make atonement for her, and she shall be clean.”
Leviticus 14:21
21 “But nif he is poor and cannot afford so much, then he shall take one male lamb for a guilt offering hto be waved, to make atonement for him, and a tenth of an ephah of fine flour mixed with oil for a grain offering, and a log of oil;