Leviticus 15:13-15

13“When the one who has a fluid discharge is cleansed of his issue, then he is to count for himself seven days for his purification and wash his clothes. Then he is to bathe his body in running water, and he will be clean.

14On the eighth day he is to take two turtledoves or two young pigeons, and come before Adonai at the entrance of the Tent of Meeting, and give them to the kohen.

15The kohen is to offer them, one for a sin offering and the other for a burnt offering. So the kohen shall make atonement for him before Adonai for his fluid discharge.