2 Samuel 22:35

so that a bow of steel, &c. And mine arms bend a bow of bronze. The ability to bend a metalbow (cp. Job 20:24) was a mark of superior strength. Readers of the Odyssey will recall Ulysses" bow, which none but himself could bend. (Hom. Od.xxi. 409).

Observe how David recognises that the advantages of physical strength and energy, important qualifications in times when the king was himself the leader of his people in battle, were gifts of God; yet that it was not these that saved him and made him victorious, but Jehovah's care and help (2 Samuel 22:36 ff.).