Mat 19:3-12
Some Pharisees approached him, and to put him to the test they said, ‘Is it against the Law for a man to divorce his wife on any pretext whatever?’ He answered, ‘Have you not read that the Creator from the beginning made them male and female and that he said: This is why a man leaves his father and mother and becomes attached to his wife, and the two become one flesh? They are no longer two, therefore, but one flesh. So then, what God has united, human beings must not divide.’