Leviticus 12:6-7

And when the days of her purifying are fulfilled, for a son, or for a daughter, she shall bring a lamb of the first year for a burnt offering, and a young pigeon, or a turtledove, for a sin offering, unto the door of the tabernacle of the congregation, unto the priest: {of the first...: Heb. a son of his year} Who shall offer it before the LORD, and make an atonement for her; and she shall be cleansed from the issue of her blood. This {is} the law for her that hath born a male or a female.