1 Corinthians 7:10

7:10 To the married I give this command – not I, but the Lord – a wife should not divorce a husband

1 Corinthians 7:15

7:15 But if the unbeliever wants a divorce, let it take place. In these circumstances the brother or sister is not bound. God has called you in peace.

Romans 7:2-3

7:2 For a married woman is bound by law to her husband as long as he lives, but if her husband dies, she is released from the law of the marriage. 7:3 So then, if she is joined to another man while her husband is alive, she will be called an adulteress. But if her husband dies, she is free from that law, and if she is joined to another man, she is not an adulteress.