Matthew 5:31-32 - The Sermon On The Mount: Divorce
31 It was said, moreover, Whosoever shall divorce his wife, let him give her a writing of divorcement; 32 But, I, say unto you, that, Everyone who divorceth his wife - saving for unfaithfulness, causeth her to be made an adulteress, - and, whosoever shall marry a divorced woman, committeth adultery.