Genesis 2:24

2:24 That is why a man leaves his father and mother and unites with his wife, and they become a new family.

Matthew 19:5-6

19:5 and said, ‘For this reason a man will leave his father and mother and will be united with his wife, and the two will become one flesh’? 19:6 So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.”

Ephesians 5:31

5:31 For this reason a man will leave his father and mother and will be joined to his wife, and the two will become one flesh.