'Sling' in the Bible

And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in the shepherd's bag that he had, into the pocket; and his sling was in his hand. And he drew near to the Philistine.

So David overcame the Philistine with a sling and a stone, and smote the Philistine and killed him; and there was no sword in the hand of David.

And if a man is risen up to pursue thee and to seek thy life, the soul of my lord shall be bound in the bundle of the living with Jehovah thy God; and the souls of thine enemies, them shall he sling out from the hollow of the sling.