5 And Jesus answered and said unto them, For the hardness of your heart he wrote you this precept. 6 But from the beginning of the creation God made them male and female. 7 cFor this cause shall a man leave his father and mother, and cleave to his wife; 8 And they twain shall be one flesh: so then they are no more twain, but one flesh. 9 What therefore God hath joined together, let not man put asunder.
Cited from Gen. 2:24.