It is like David s tower, built for an armory, whereon hang a thousand bucklers, all shields of mighty men. Fear not, I am thy shield, and thy exceeding great reward. Faith improves and makes use of every perfection in God, as a shield, his love, grace, power, faithfulness, etc. 3. and Yalkut in loc. Theatrubs Terrae Sanctae, p. 168.
Jewish writers differ about the sense and derivation of it.