Luke 16:18
Every man who divorces his wife and marries another commits adultery; and he who marries her when so divorced from her husband commits adultery.
Matthew 19:9
And I tell you that whoever divorces his wife for any reason except her unfaithfulness, and marries another woman, commits adultery."
Matthew 5:31-32
"It was also said, 'If any man puts away his wife, let him give her a written notice of divorce.'
Mark 10:11-12
He replied, "Whoever divorces his wife and marries another woman, commits adultery against the first wife;
1 Corinthians 7:4
A married woman is not mistress of her own person: her husband has certain rights. In the same way a married man is not master of his own person: his wife has certain rights.
1 Corinthians 7:10-12
But to those already married my instructions are--yet not mine, but the Lord's--that a wife is not to leave her husband;