'Unbelieving' in the Bible

Instead, one brother goes to court against another brother, and before unbelieving judges, at that!

But I (not the Lord) say to the rest: If any brother has an unbelieving wife and she is willing to live with him, he must not leave her.

Also, if any woman has an unbelieving husband and he is willing to live with her, she must not leave her husband.

For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy.

But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.

and if any one of the unbelieving do call you, and ye wish to go, all that is set before you eat, nothing inquiring, because of the conscience;

so that the tongues are for a sign, not to the believing, but to the unbelieving; and the prophesy is not for the unbelieving, but for the believing,

If therefore the whole church be assembled together and all speak with tongues, and there come in men unlearned or unbelieving, will they not say that ye are mad?

But if all prophesy, and there come in one unbelieving or unlearned, he is reproved by all, he is judged by all;