Matthew 19:4-6

New Revised Standard Version, Anglicised Catholic Edition

⁴ He answered, ‘Have you not read that the one who made them at the beginning “made them male and female”, ⁵ and said, “For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh”? ⁶ So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.’