Leviticus 15:30-32

American Standard Version

³⁰ And the priest shall offer the one for a sin-offering, and the other for a burnt-offering; and the priest shall make atonement for her before Jehovah for the issue of her uncleanness.

³¹ Thus shall ye separate the children of Israel from their uncleanness, that they die not in their uncleanness, when they defile my tabernacle that is in the midst of them.

³² This is the law of him that hath an issue, and of him whose seed of copulation goeth from him, so that he is unclean thereby;