1 Samuel 17:45,49,50 David said to the Philistine, “You come against me with sword and spear and javelin, but I come against you in the name of the LORD Almighty, the God of the armies of Israel, whom you have defied. Reaching into his bag and taking out a stone, he slung it and struck the Philistine on the forehead. The stone sank into his forehead, and he fell facedown on the ground. So David triumphed over the Philistine with a sling and a stone; without a sword in his hand he struck down the Philistine and killed him.
Psalm 33:16,18 No king is saved by the size of his army; no warrior escapes by his great strength.But the eyes of the LORD are on those who fear him, on those whose hope is in his unfailing love,