'Stones' 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 a shepherd's bag which he had, even in a scrip; and his sling was in his hand: and he drew near to the Philistine.

As soon as the boy was gone, David got up from the south side [beside the mound of stones] and fell on his face to the ground [in submission and respect], and bowed three times. Then they kissed one another and wept together, but David wept more.

“When someone pursues you and attempts to take your life, my lord’s life will be tucked safely in the place where the Lord your God protects the living. However, He will fling away your enemies’ lives like stones from a sling.