John 4:18
for you have had five husbands, and he whom you now have is not your husband. In this you have spoken truly.
Mark 10:12
and if a woman puts away her husband and marries another, she commits adultery.
Romans 7:3
Therefore while the husband lives, she shall be called an adulteress if she is married to another man; but if the husband has died, she is free from the law, so that she is not an adulteress if married to another man.
1 Corinthians 7:10-11
But the married I charge, not I, but the Lord, Let not a wife separate from her husband,
Hebrews 13:4
Marriage is honorable in all, and married life without blame; but fornicators and adulterers God will judge.