Judges 20:16

Among all these were seven hundred picked men who were left-handed; every one could sling a stone at a hair, and not miss.

Judges 3:15

But when the people of Israel cried to the LORD, the LORD raised up for them a deliverer, Ehud, the son of Gera, the Benjaminite, a left-handed man. The people of Israel sent tribute by him to Eglon the king of Moab.

1 Chronicles 12:2

armed with bows, using both the right hand and the left with stones and with arrows on the bow; they were of Saul's brethren of Benjamin:

1 Samuel 17:40

And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in the shepherd's bag that he had, into the pocket; and his sling was in his hand. And he drew near to the Philistine.

1 Samuel 17:49-50

And David put his hand into the 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 on his face to the earth.

1 Samuel 25:29

And if a man is risen up to pursue thee and to seek thy life, the soul of my lord shall be bound in the bundle of the living with Jehovah thy God; and the souls of thine enemies, them shall he sling out from the hollow of the sling.

2 Chronicles 26:14

And Uzziah prepared for them, throughout the host, shields, and spears, and helmets, and coats of mail, and bows, and even slinging-stones.

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
But when the people of Israel cried to the LORD, the LORD raised up for them a deliverer, Ehud, the son of Gera, the Benjaminite, a left-handed man. The people of Israel sent tribute by him to Eglon the king of Moab.
1 Chronicles 12:2
armed with bows, using both the right hand and the left with stones and with arrows on the bow; they were of Saul's brethren of Benjamin:

Sling stones

1 Samuel 17:40
And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in the shepherd's bag that he had, into the pocket; and his sling was in his hand. And he drew near to the Philistine.
1 Samuel 25:29
And if a man is risen up to pursue thee and to seek thy life, the soul of my lord shall be bound in the bundle of the living with Jehovah thy God; and the souls of thine enemies, them shall he sling out from the hollow of the sling.
2 Chronicles 26:14
And Uzziah prepared for them, throughout the host, shields, and spears, and helmets, and coats of mail, and bows, and even slinging-stones.