John 4:18
"For you have had five husbands, and the man with whom you are now living is not your husband; in saying that, you have spoken the truth."
Mark 10:12
And, if the woman divorces her husband and marries another man, she is guilty of adultery."
Romans 7:3
If, then, during her husband's lifetime, she unites herself to another man, she will be called an adulteress; but, if her husband dies, the law has no further hold on her, nor, if she unites herself to another man, is she an adulteress.
1 Corinthians 7:10-11
To those who are married my direction is-yet it is not mine, but the Master's-that a woman is not to leave her husband
Hebrews 13:4
Let marriage be honoured by all and the married life be pure; for God will judge those who are immoral and those who commit adultery.