Leviticus 20:10-21

"10  And the man that committeth adultery with another man’s wife, even he that committeth adultery with his neighbour’s wife, the adulterer and the adulteress shall surely be put to death. 11 And the man that lieth with his father’s wife hath uncovered his father’s nakedness: both of them shall surely be put to death; their blood shall be upon them. 12 And if a man lie with his daughter in law, both of them shall surely be put to death: they have wrought confusion; their blood shall be upon them. 13 If a man also lie with mankind, as he lieth with a woman, both of them have committed an abomination: they shall surely be put to death; their blood shall be upon them. 14 And if a man take a wife and her mother, it is wickedness: they shall be burnt with fire, both he and they; that there be no wickedness among you. 15 And if a man lie with a beast, he shall surely be put to death: and ye shall slay the beast. 16 And if a woman approach unto any beast, and lie down thereto, thou shalt kill the woman, and the beast: they shall surely be put to death; their blood shall be upon them. 17 And if a man shall take his sister, his father’s daughter, or his mother’s daughter, and see her nakedness, and she see his nakedness; it is a wicked thing; and they shall be cut off in the sight of their people: he hath uncovered his sister’s nakedness; he shall bear his iniquity. 18 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. 19 And thou shalt not uncover the nakedness of thy mother’s sister, nor of thy father’s sister: for he uncovereth his near kin: they shall bear their iniquity. 20 And if a man shall lie with his uncle’s wife, he hath uncovered his uncle’s nakedness: they shall bear their sin; they shall die childless. 21 And if a man shall take his brother’s wife, it is an unclean thing: he hath uncovered his brother’s nakedness; they shall be childless." —  Leviticus 20:10-21 KJV.

10. The adulterer and the adulteress — In the Mosaic law adultery is committed only through the unchastity of a wife. A husband commits this crime only with the free wife of another. See Exodus 20:14, note. Put to death — If the adulteress was another’s slave, the penalty was milder, probably corporeal punishment. The allowance of polygamy implies that the wife has no such exclusive right to the husband as the husband has to the wife. In many countries the adulteress has suffered capital punishment while the adulterer has escaped with a less penalty. Since this crime destroys the family, the corner-stone of society, it deserves the severest penalty. If both parties are married persons, the crime is double adultery; if but one is under marriage vows, it is single. See Exodus 20:14, note.