Jamieson, Fausset and Brown on 1 Chronicles 12:14

14. one of the least was over an hundred, and the greatest over a thousand--David, while at Ziklag, had not so large an amount of forces as to give to each of these the command of so many men. Another meaning, therefore, must obviously be sought, and excluding was, which is a supplement by our translators, the import of the passage is, that one of the least could discomfit a hundred, and the greatest was worth a thousand ordinary men; a strong hyperbole to express their uncommon valor.