Leviticus 15:13-15

13‘And when he who has a discharge is cleansed of his discharge, then he shall count for himself seven days for his cleansing, wash his clothes, and bathe his body in running water; then he shall be clean.

14On the eighth day he shall take for himself two turtledoves or two young pigeons, and come before the Lord, to the door of the tabernacle of meeting, and give them to the priest.

15Then the priest shall offer them, the one as a sin offering and the other as a burnt offering. So the priest shall make atonement for him before the Lord because of his discharge.