John 4:18
for thou hast had five husbands; and he, whom thou now hast, is not thy husband: this thou hast said true.
Mark 10:12
And if a woman be divorced from her husband, and be married to another, she committeth adultery.
Romans 7:3
Therefore while her husband is living, she shall be called an adulteress if she become another man's: but if her husband be dead, she is free from the law; so that she is not an adulteress, though she become another man's.
1 Corinthians 7:10-11
But those that are married, not I command, but the Lord, that the wife be not separated from her husband;
Hebrews 13:4
Marriage is honorable in all, and the bed is not defiled: but whoremongers and adulterers God will judge.