'Unbeliever' in the Bible

To the rest it is I who speak--not the Lord. If a brother has a wife who is an unbeliever, and she consents to live with him, let him not send her away.

If, however, the unbeliever is determined to leave, let him or her do so. Under such circumstances the Christian man or woman is no slave; God has called us to live lives of peace.

If an unbeliever gives you an invitation and you are disposed to accept it, eat whatever is put before you, and ask no questions for conscience' sake.

If, on the other hand, every one is prophesying and an unbeliever or an ungifted man comes in, he is convicted by all and closely examined by all,

Where can harmony between Christ and Belial be found? Or what participation has a believer with an unbeliever?

But if a man makes no provision for those dependent on him, and especially for his own family, he has disowned the faith and is behaving worse than an unbeliever.