Matthew 19:4-6, "And he answered and said, Have ye not read, that he who made them from the beginning made them male and female, and said, For this cause shall a man leave his father and mother, and shall cleave to his wife; and the two shall become one flesh? So that they are no more two, but one flesh. What therefore God hath joined together, let not man put asunder."
Matthew 19:7-9, They say unto him, Why then did Moses command to give a bill of divorcement, and to put her away? 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. 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." (ASV)
Not everything in the "Law of Moses" was directly from God.
Frank