Leviticus 15
29 and on the eighth day she taketh to herself two turtle-doves, or two young pigeons, and hath brought them in unto the priest, unto the opening of the tent of meeting;
30 and the priest hath made the one a sin-offering, and the one a burnt-offering, and the priest hath made atonement for her before Jehovah, because of the issue of her uncleanness.