Leviticus 15:13-15

13And when he that hath a flux is clean of his flux, then he shall count seven days for his cleansing, and wash his clothes, and bathe his flesh in running water, and he shall be clean.

14And on the eighth day he shall take two turtle-doves, or two young pigeons, and come before Jehovah unto the entrance of the tent of meeting, and give them unto the priest.

15And the priest shall offer them, one as a sin-offering, and one as a burnt-offering; and the priest shall make atonement for him before Jehovah for his flux.