And the two shall be one flesh: so then they are no more two, but one flesh.
Therefore shall a man leave his father and his mother, and shall cleave to his wife: and they shall be one flesh.
What therefore God has joined together, let not man put asunder.
What? Do you not know that he who is joined to a harlot is one body with her? For two, says he, shall be one flesh.
So ought men to love their wives as their own bodies. He that loves his wife loves himself.