'Immorality' in the Bible

But I tell you, everyone who divorces his wife, except in a case of sexual immorality, causes her to commit adultery. And whoever marries a divorced woman commits adultery.

It is out of the heart that evil thoughts come, as well as murder, adultery, sexual immorality, stealing, false testimony, and slander.

And I tell you, whoever divorces his wife, except for sexual immorality, and marries another, commits adultery.”