'Unjust' in the Bible

Moreover thou shalt provide out of all the people able men, such as fear God, men of truth, hating unjust gain; and place such over them, to be rulers of thousands, rulers of hundreds, rulers of fifties, and rulers of tens:

Judge me, O God, and plead my cause against an ungodly nation: Oh deliver me from the deceitful and unjust man.

An unjust man is an abomination to the righteous; And he that is upright in the way is an abomination to the wicked.

Jehovah in the midst of her is righteous; he will not do iniquity; every morning doth he bring his justice to light, he faileth not; but the unjust knoweth no shame.