Matthew 19:5-8 NIV

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’a?

References for Matthew 19:5

6 So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.”
7 “Why then,” they asked, “did Moses command that a man give his wife a certificate of divorce and send her away?”

References for Matthew 19:7

8 Jesus replied, “Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning.