John 4:18
for you have had five husbands, and he whom you now have, is not your husband: in that you said true.
Mark 10:12
and if a woman quits her husband and is married to another, she committeth adultery.
Romans 7:3
wherefore she will be reputed an adulteress if she become another man's during her husband's life: but if her husband dies, she is clear from that law, from the imputation of being an adulteress, though she become another man's.
1 Corinthians 7:10-11
as to the married, I enjoin this rule, not as from my self, but from the Lord, that a woman should not leave her husband:
Hebrews 13:4
Marriage is every where honourable, and that state is innocent: but the licentious and adulterers God will punish.