Judges 20:16

From all this people, seven hundred chosen men shut up of the right hand, slinging at a hair, and they will not miss.

Judges 3:15

And the sons of Israel will cry to Jehovah, and Jehovah will raise up to them a saviour, Ehud, son of Gera, son of a Benjamite, a man shut up of his right hand: and the sons of Israel will send a gift by his hand to Eglon, king of Moab.

1 Chronicles 12:2

Bending the bows from the right hands and from the left with stones and with arrows, with the bow from Saul's brethren of Benjamin:

1 Samuel 17:40

And he will take his rod in his hand, and he will choose to him five smooth stones from the torrent, and he will put them in a vessel of the shepherds, which is to him, and in a sack; and his sling in his hand: and he will draw near to him of the rovers.

1 Samuel 17:49-50

And David will stretch forth his hand to the vessel and take from thence a stone and sling and strike him of the rovers into his forehead, and the stone will sink into his forehead; and he will fall upon his face to the earth.

1 Samuel 25:29

And a man will rise to pursue thee, and to seek thy soul: and the soul of my lord was bound up in the bundle of lives with Jehovah thy God; and the soul of thine enemies he will sling out in the midst of the hand of the sling.

2 Chronicles 26:14

And Uzziah will prepare for them for all the army shields and spears, and helmets, and coats of mail, and bows, and for stones of slings.

Treasury of Scripture Knowledge

Summary

Among all this people there were seven hundred chosen men lefthanded; every one could sling stones at an hair breadth, and not miss.

Bible References

Left-handed

Judges 3:15
And the sons of Israel will cry to Jehovah, and Jehovah will raise up to them a saviour, Ehud, son of Gera, son of a Benjamite, a man shut up of his right hand: and the sons of Israel will send a gift by his hand to Eglon, king of Moab.
1 Chronicles 12:2
Bending the bows from the right hands and from the left with stones and with arrows, with the bow from Saul's brethren of Benjamin:

Sling stones

1 Samuel 17:40
And he will take his rod in his hand, and he will choose to him five smooth stones from the torrent, and he will put them in a vessel of the shepherds, which is to him, and in a sack; and his sling in his hand: and he will draw near to him of the rovers.
1 Samuel 25:29
And a man will rise to pursue thee, and to seek thy soul: and the soul of my lord was bound up in the bundle of lives with Jehovah thy God; and the soul of thine enemies he will sling out in the midst of the hand of the sling.
2 Chronicles 26:14
And Uzziah will prepare for them for all the army shields and spears, and helmets, and coats of mail, and bows, and for stones of slings.