Military Arms: Offensive: Sling

Thus David prevailed over the Philistine with a sling and a stone; without a sword in his hand he struck down the Philistine and killed him.

They destroyed the cities, and each man threw stones on every good field until it was covered. They stopped up every spring and cut down every good tree. Only Kir-haraseth was left with stones in place, but men with slings surrounded it and attacked it as well.