1 Corinthians 7:15But if the unbeliever leaves, let him do so.
A believing man or woman is not bound in such circumstances; God has called us to live in peace. 16How do you know, wife, whether you will save your husband? Or, how do you know, husband, whether you will save your wife?
Mark 10 5"It was because your hearts were hard that Moses wrote you this law," Jesus replied. 6"But at the beginning of creation God 'made them male and female.'[
a] 7'For this reason a man will leave his father and mother and be united to his wife,[
b] 8and the two will become one flesh.'[
c] So they are no longer two, but one. 9Therefore what God has joined together, let man not separate."10When they were in the house again, the disciples asked Jesus about this. 11He answered, "Anyone who divorces his wife and marries another woman commits adultery against her. 12And if she divorces her husband and marries another man, she commits adultery."
Luke 16: 18"Anyone who divorces his wife and marries another woman commits adultery, and the man who marries a divorced woman commits adultery.
Matthew 5: 31"It has been said, 'Anyone who divorces his wife must give her a certificate of divorce.'[
f] 32But I tell you that anyone who divorces his wife,
except for marital unfaithfulness, causes her to become an adulteress, and anyone who marries the divorced woman commits adultery.
The only two 'out' clauses in the Bible seem to be 1. If an unbelieving spouse leaves you, then you're not bound. 2. The spouse commits adultery, then you're not bound. And of course if the spouse dies then you're not bound either.