Lev Leviticus3. Mósebók, chapterkafli Book of LeviticusÞriðja Mósebók, chapterkafli 20

And if a man shall lie with a woman having her sickness, and shall uncover her nakedness — he hath made naked her fountain, and she hath uncovered the fountain of her blood — both of them shall be cut off from among their people.