Matthew 19:4-6 NIV

4 "Haven't you read," he replied, "that at the beginning the Creator 'made them male and female,'a1

References for Matthew 19:4

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 ?2

References for Matthew 19:5

6 So they are no longer two, but one. Therefore what God has joined together, let man not separate."