Exodus 20:14 KJV - Thou shalt not commit adultery.
Leviticus 20:10 DV - And the man that commits adultery with another man's wife, even he that commits adultery with his neighbour's wife, the adulterer and the adulteress shall surely be put to death.
Deuteronomy 22:22-24 KJV - If a man be found lying with a woman married to an husband, then they shall both of them die, both the man that lay with the woman, and the woman: so shalt thou put away evil from Israel. 23 If a damsel that is a virgin be betrothed unto an husband, and a man find her in the city, and lie with her; 24 Then ye shall bring them both out unto the gate of that city, and ye shall stone them with stones that they die; the damsel, because she cried not, being in the city; and the man, because he hath humbled his neighbour's wife: so thou shalt put away evil from among you.
Matthew 5:27-28 KJV - Ye have heard that it was said by them of old time, Thou shalt not commit adultery: 28 But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart.
Mark 10:11-12 KJV - And he saith unto them, Whosoever shall put away his wife, and marry another, committeth adultery against her. 12 And if a woman shall put away her husband, and be married to another, she committeth adultery.