Leviticus 15:28-30 - Purity Regulations From Female Bodily Discharges
28 And if she was cleansed from her flowing, and she numbered to her seven days, and afterward she shall be clean. 29 And in the eighth day she shall take to her two turtle-doves, or two sons of the dove, and she brought them to the priest to the door of the tent of appointment. 30 And the priest did the one a sin, and the one a burnt-offering; and the priest expiated for her, before Jehovah, from the flowing of her uncleanness.