Leviticus 15:28-30

New Century Version

²⁸ When the woman becomes clean from her bleeding, she must wait seven days, and after this she will be clean. ²⁹ Then on the eighth day she must take two doves or two young pigeons and bring them to the priest at the entrance of the Meeting Tent. ³⁰ The priest must offer one bird for a sin offering and the other for a whole burnt offering. In this way the priest will make her clean so she can belong to the Lord again.