Leviticus 15:30-32

The Voice

³⁰ The priest will present one as a purification offering for sin and the other as a burnt offering. The priest will come before Me and cover the impurity of the woman with a discharge.

³¹ This is how you are to separate and deal with the people of Israel during those times when they are ritually impure, so that they will not die from their impurity by defiling My sanctuary that stands among them.