'Stones' in the Bible

Then he took his stick in his hand, and got five smooth stones from the bed of the stream and put them in a bag such as is used by sheep-keepers; and in his hand was a leather band used for sending stones: and so he went in the direction of the Philistine.

And though a man has taken up arms against you, putting your life in danger, still the soul of my lord will be kept safe among the band of the living with the Lord your God; and the souls of those who are against you he will send violently away from him, like stones from a bag.