Leviticus 15:28-31

28When she is cured of her discharge, she is to count seven days, and after that she will be clean.

29On the eighth day she must take two turtledoves or two young pigeons and bring them to the priest at the entrance to the tent of meeting.

30The priest is to sacrifice one as a sin offering and the other as a burnt offering. In this way the priest will make atonement for her before the Lord because of her unclean discharge.

31“You must keep the Israelites from their uncleanness, so that they do not die by defiling my tabernacle that is among them.