Leviticus 15:28-30 - Purity Regulations From Female Bodily Discharges
28 But if she is cleansed of her issue, then she shall number to herself seven days, and after that she shall be clean. 29 And on the eighth day she shall take to her two turtle-doves, or two young pigeons, and bring them to the priest, to the door of the tent of meeting. 30 And the priest shall offer the one for a sin-offering, and the other for a burnt-offering, and the priest shall make atonement for her before LORD for the issue of her uncleanness.