Genesis 2:24Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
Genesis 2:18And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
Matthew 19:4-6And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female, And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh? Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
Matthew 19:8He 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.