Matthew 19
6 Ref Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
7 Ref They say unto him, Why did Moses then command to give a writing of divorcement, and to put her away?
8 Ref He saith unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.