Leviticus 15:28-30 - Purity Regulations From Female Bodily Discharges
28 But if she is cleansed of her discharge, she shall count for herself seven days, and after that she shall be clean. 29 And on the eighth day she shall take two turtledoves or two pigeons and bring them to the priest, to the entrance of the tent of meeting. 30 And the priest shall use one for a sin offering and the other for a burnt offering. And the priest shall make atonement for her before the LORD for her unclean discharge.