124. How should a man who has sex with a menstruating woman be punished?

He shall be unclean for seven days.

And if any man lie with her at all, and her flowers be upon him, he shall be unclean seven days; and all the bed whereon he lieth shall be unclean. Leviticus 15:24

He and the woman shall be cut off from among their people.

And if a man shall lie with a woman having her sickness, and shall uncover her nakedness; he hath discovered her fountain, and she hath uncovered the fountain of her blood: and both of them shall be cut off from among their people. Leviticus 20:18

Christian Responses
Annotated Skeptic's Annotated Bible
Biblical Hermeneutics

The Bible and the Quran agree: Stay away from menstruating women