Leviticus 15:13-15

13“When the man with the discharge is healed, he must count off seven days for the period of purification. Then he must wash his clothes and bathe himself in fresh water, and he will be ceremonially clean.

14On the eighth day he must get two turtledoves or two young pigeons and come before the Lord at the entrance of the Tabernacle and give his offerings to the priest.

15The priest will offer one bird for a sin offering and the other for a burnt offering. Through this process, the priest will purify the man before the Lord for his discharge.