Leviticus 15:13-15

13“When the man with the discharge has been cured of it, he is to count seven days for his cleansing, wash his clothes, and bathe his body in fresh water; he will be clean.

14He must take two turtledoves or two young pigeons on the eighth day, come before the Lord at the entrance to the tent of meeting, and give them to the priest.

15The priest is to sacrifice them, one as a sin offering and the other as a burnt offering. In this way the priest will make atonement for him before the Lord because of his discharge.