Leviticus 12:7-8

7Then he shall offer it before the Lord and make atonement for her, and she shall be cleansed from the 1flow of her blood. This is the law for her who gives birth to a child, whether a male or a female.

8But if 2she cannot afford a lamb, then she shall take 3two turtledoves or two young doves, 4the one as a burnt offering and the other as a 5sin offering; and the 6priest shall make atonement for her, and she will be clean.’”