slings to cast stone
Judges 20:16
Among all these were seven hundred picked men who were left-handed; every one could sling a stone at a hair, and not miss.
1 Samuel 17:49
And David put his hand in his bag and took out a stone, and slung it, and struck the Philistine on his forehead; the stone sank into his forehead, and he fell on his face to the ground.