Leviticus 12:6-8

6‘When the days of her purification are completed, whether for a son or for a daughter, she shall bring to the priest at the doorway of the Tent of Meeting a one year old lamb as a burnt offering and a young pigeon or a turtledove as a sin offering;

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

8If she cannot afford a lamb then she shall take two turtledoves or young pigeons, one as a burnt offering, the other as a sin offering; the priest shall make atonement for her, and she will be clean.’ ”