Leviticus 15:13-15

13And when he that hath an issue is cleansed of his issue, then he shall number to himself seven days for his cleansing, and wash his clothes; and he shall bathe his flesh in running water, and shall be clean.

14And on the eighth day he shall take to him two turtledoves, or two young pigeons, and come before the LORD unto the door of the tent of meeting, and give them unto the priest:

15and the priest shall offer them, the one for a sin offering, and the other for a burnt offering; and the priest shall make atonement for him before the LORD for his issue.