Saveth — That is, that he can save without these arms, and with the most contemptible weapons. The battle — That is, the events of war are wholly in his power. He will — David speaks thus confidently, because he was assured of it by a particular inspiration.
Related Commentaries of 1 Samuel 17:47
1 Samuel 17:47
47 And all this assembly shall know that the LORD saveth not with sword and spear: for the battle is the LORD'S, and he will give you into our hands.