Luke 16:18
"Everyone who divorces his wife and marries another commits adultery, and he who marries a woman divorced from her husband commits adultery.
Matthew 19:9
And I say to you: whoever divorces his wife, except for sexual immorality, and marries another, commits adultery."
Matthew 5:31-32
"It was also said, 'Whoever divorces his wife, let him give her a certificate of divorce.'
Mark 10:11-12
And he said to them, "Whoever divorces his wife and marries another commits adultery against her,
1 Corinthians 7:4
For the wife does not have authority over her own body, but the husband does. Likewise the husband does not have authority over his own body, but the wife does.
1 Corinthians 7:10-12
To the married I give this charge (not I, but the Lord): the wife should not separate from her husband