Staff — His shepherd's staff. These arms in themselves were contemptible, yet chosen by David; because he had no skill to use other arms; because he had inward assurance of the victory, even by these weapons; and because such a conquest would be more honourable to God, and most shameful, and discouraging to the Philistines.
Related Commentaries of 1 Samuel 17:40
1 Samuel 17:40
40 And he took his staff in his hand, and chose him five smooth stones out of the brook,k and put them in a shepherd's bag which he had, even in a scrip; and his sling was in his hand: and he drew near to the Philistine.