Judges 20:16

Who were left-handed, able to send a stone at a hair without error.

Judges 3:15

Then when the children of Israel made prayer to the Lord, he gave them a saviour, Ehud, the son of Gera, the Benjamite, a left-handed man; and the children of Israel sent an offering by him to Eglon, king of Moab.

1 Chronicles 12:2

They were armed with bows, and were able to send stones, and arrows from the bow, with right hand or left: they were Saul's brothers, of Benjamin.

1 Samuel 17:40

Then he took his stick in his hand, and got five smooth stones from the bed of the stream and put them in a bag such as is used by sheep-keepers; and in his hand was a leather band used for sending stones: and so he went in the direction of the Philistine.

1 Samuel 17:49-50

And David put his hand in his bag and took out a stone and sent it from his leather band straight at the Philistine, and the stone went deep into his brow, and he went down to the earth, falling on his face.

1 Samuel 25:29

And though a man has taken up arms against you, putting your life in danger, still the soul of my lord will be kept safe among the band of the living with the Lord your God; and the souls of those who are against you he will send violently away from him, like stones from a bag.

2 Chronicles 26:14

And Uzziah had all these forces armed with body-covers and spears and head-covers and coats of metal and bows and stones for sending from leather bands.

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
Then when the children of Israel made prayer to the Lord, he gave them a saviour, Ehud, the son of Gera, the Benjamite, a left-handed man; and the children of Israel sent an offering by him to Eglon, king of Moab.
1 Chronicles 12:2
They were armed with bows, and were able to send stones, and arrows from the bow, with right hand or left: they were Saul's brothers, of Benjamin.

Sling stones

1 Samuel 17:40
Then he took his stick in his hand, and got five smooth stones from the bed of the stream and put them in a bag such as is used by sheep-keepers; and in his hand was a leather band used for sending stones: and so he went in the direction of the Philistine.
1 Samuel 25:29
And though a man has taken up arms against you, putting your life in danger, still the soul of my lord will be kept safe among the band of the living with the Lord your God; and the souls of those who are against you he will send violently away from him, like stones from a bag.
2 Chronicles 26:14
And Uzziah had all these forces armed with body-covers and spears and head-covers and coats of metal and bows and stones for sending from leather bands.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain