defence - rather, as the same Hebrew means in Job 22:24 (see on Job 22:24) - Thy precious metals; God will be to thee in the place of riches.
plenty of silver - rather, “And shall be to thee in the place of laboriously-obtained treasures of silver” [Gesenius]. Elegantly implying, it is less labor to find God than the hidden metals; at least to the humble seeker (Job 28:12-28). But [Maurer] “the shining silver.”