Leviticus 12:6-7

Thomson(i) 6 And when the days of her purification are compleated, either for a son or a daughter, she shall bring a lamb of the first year, without blemish, for a whole burnt offering, and a young pigeon, or a turtle dove, for a sin offering, to the door of the tabernacle of the testimony, to the priest, 7 and present it before the Lord. And the priest shall make atonement for her, and purify her from the issue of her blood. This is the law touching her who beareth a male or a female child.