'Righteous' in the Bible

And Jehovah will return his blood upon his own head, because he fell upon two men more righteous and better than he, and slew them with the sword, and my father David knew it not, to wit , Abner the son of Ner, captain of the host of Israel, and Amasa the son of Jether, captain of the host of Judah.

then hear thou in heaven, and do, and judge thy servants, condemning the wicked, to bring his way upon his own head, and justifying the righteous, to give him according to his righteousness.