John 4:18
for thou hast had five husbands; and he whom thou now hast is not thy husband: in this thou hast spoken true.
Mark 10:12
and if a wife put away her husband, and marrieth another, she committeth adultery.
Romans 7:3
She shall therefore certainly be counted an adulteress, if, her husband being alive, she be for another man: but if her husband is dead, she is free from the law; so that she shall be no adulteress, though married to another husband.
1 Corinthians 7:10-11
But to the married not I command, but the Lord, That the wife be not separated from the husband:
Hebrews 13:4
Marriage is honourable for all persons, and the marriage bed undefiled: but whoremongers and adulterers God will judge.