Leviticus 15:13-16

¹³"And when he who has a discharge is cleansed of his discharge, then he shall count for himself seven days for his cleansing, and wash his clothes; and he shall bathe his body in running water, and shall be clean. ¹⁴And on the eighth day he shall take two turtledoves or two young pigeons, and come before the LORD to the door of the tent of meeting, and give them to the priest; ¹⁵and the priest shall offer them, 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 discharge.

¹⁶"And if a man has an emission of semen, he shall bathe his whole body in water, and be unclean until the evening.