Matthew Poole and continuators on 1 Samuel 17:47

47 And all this assembly shall know, that the LORD saveth not with sword and spear , (for the battel is the LORDS ,) and he will give you into our hands .

i. e. That he can save without these Arms, and with the most contemptible Weapons, such as mine seem to thee.

i. e. The Events of War are wholly in his Power, to give Success to whom, and by what means he pleaseth.

David speaks thus confidently, because he was assured of it by a particular Inspiration from God.