'Unrighteous' in the Bible

And his lord commended the unrighteous steward because he had done wisely: for the sons of this world are for their own generation wiser than the sons of the light.

He that is faithful in a very little is faithful also in much: and he that is unrighteous in a very little is unrighteous also in much.

If therefore ye have not been faithful in the unrighteous mammon, who will commit to your trust the true riches ?

And the Lord said, Hear what the unrighteous judge saith.