Cross reference
2 Chronicles 26:14
14 And 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 lefthanded; every one could sling stones at a hair-breadth, and not miss.
1 Samuel 17:49
49 And David put his hand in his bag, and took thence a stone, and slang it, and smote the Philistine in his forehead; and the stone sank into his forehead, and he fell upon his face to the earth.