'Unchaste' in the Bible

You who say that one must not commit adultery, do you commit adultery? You who detest idols, do you rob [pagan] temples [of valuable idols and offerings]?

I wrote you in my [previous] letter not to associate with [sexually] immoral people—

Marriage is to be held in honor among all [that is, regarded as something of great value], and the marriage bed undefiled [by immorality or by any sexual sin]; for God will judge the sexually immoral and adulterous.