Matthew 19:4-6 (New International Version)

 ⁴"Haven't you read," he replied, "that at the beginning the Creator 'made them male and female,'^{[a] 5}and said, 'For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh'^[b]? ⁶So they are no longer two, but one. Therefore what God has joined together, let man not separate."