Matthew 19
7 Ref They say unto him, Why then did Moses command to give a bill of divorcement, and to put `her' away?
8 Ref He saith unto them, Moses for your hardness of heart suffered you to put away your wives: but from the beginning it hath not been so.
9 Ref And I say unto you, Whosoever shall put away his wife, except for fornication, and shall marry another, committeth adultery: and he that marrieth her when she is put away committeth adultery.