Leviticus 15:27-33

²⁷Whoever touches any of those things will be unclean; he must wash his clothes and bathe himself in water, and he will be unclean until evening.

²⁸But if she is cleansed from her flow of blood, then she will count for herself seven days, and after that she will be clean.

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

³⁰The priest will offer one bird as a sin offering and the other as a burnt offering, and he will make atonement for her before Yahweh for her unclean flow of blood.

³¹This is how you must separate the people of Israel from their uncleanness, so they will not die due to their uncleanness, by defiling my tabernacle, where I live among them.

³²These are the regulations for anyone who has a flow of fluid, for any man whose semen goes out of him and makes him unclean,

³³for any woman who has a menstrual period, for anyone with a flow of fluid, whether male or female, and for any man who sleeps with an unclean woman.'”