Then the priest shall offer the one as a sin offering and the other as a burnt offering, and the priest shall make atonement for her before the LORD for the discharge of her uncleanness.
Leviticus 15:30
Surrounding context
15:29 And on the eighth day she shall take for herself two turtledoves or two young pigeons, and bring them to the priest, to the door of the tabernacle of meeting.
15:30 Then the priest shall offer the one as a sin offering and the other as a burnt offering, and the priest shall make atonement for her before the LORD for the discharge of her uncleanness.
15:31 "Thus you shall separate the children of Israel from their uncleanness, lest they die in their uncleanness when they defile My tabernacle that is among them.