'Workers' in the Bible

But he shall say, I tell you, I know you not whence ye are; depart from me, all ye workers of iniquity.

Are all apostles? are all prophets? are all teachers? are all workers of miracles?

We then, as workers together with him, beseech you also that ye receive not the grace of God in vain.

For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.

Beware of dogs, beware of evil workers, beware of the concision.