Matthew 5:32

³²But now listen to what I say to you: A man may divorce his wife only if she has committed adultery, and not for any other reason. If a man divorces his wife for any other reason, and he has sex with another woman, he makes his wife become one against whom he has committed adultery, because in God's estimation she still is his wife. Also, if a man marries a woman who is divorced {whose husband has divorced her}, God considers him guilty of committing adultery.”