Cross reference
2 Chronicles 26:14
14 Uzziah prepared for them, even for all the host, shields, and spears, and helmets, and coats of mail, and bows, and stones for slinging.
Judges 20:16
16 Among all this people there were seven hundred chosen men left-handed; everyone could sling stones at a hair-breadth, and not miss.
1 Samuel 17:49
49 David put his hand in his bag, and took there a stone, and slang it, and struck the Philistine in his forehead; and the stone sank into his forehead, and he fell on his face to the earth.