Genesis 2:24
24 tTherefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh.
Malachi 2:15
15 aDid he not make them one, with a portion of the Spirit in their union?1 And what was the one God2 seeking?3 bGodly offspring. So guard yourselves4 in your spirit, and let none of you be tfaithless to the wife of your youth.
Matthew 19:5–6
5 and said, u‘Therefore a man shall leave his father and his mother and hold fast to his wife, and vthe two shall become one flesh’? 6 So they are no longer two but one flesh. wWhat therefore God has joined together, let not man separate.”