'Reprobate' in the Bible

Try your own selves, whether ye are in the faith; prove your own selves. Or know ye not as to your own selves, that Jesus Christ is in you? unless indeed ye be reprobate.

But I hope that ye shall know that we are not reprobate.

Now we pray to God that ye do no evil; not that we may appear approved, but that ye may do that which is honorable, though we be as reprobate.