Leviticus 20:18
18 “‘If a man lies with a woman having her monthly period, and uncovers her nakedness; he has made naked her fountain, and she has uncovered the fountain of her blood. Both of them shall be cut off from among their people.
18 “‘If a man lies with a woman having her monthly period, and uncovers her nakedness; he has made naked her fountain, and she has uncovered the fountain of her blood. Both of them shall be cut off from among their people.