1 Chronicles 12:2

They were equipped with bows, using both the right hand and the left to sling stones and to shoot arrows from the bow; they were Saul’s kinsmen from Benjamin.

Judges 3:15

But when the sons of Israel cried to the Lord, the Lord raised up a deliverer for them, Ehud the son of Gera, the Benjamite, a left-handed man. And the sons of Israel sent tribute by him to Eglon the king of Moab.

Judges 20:16

Out of all these people 700 choice men were left-handed; each one could sling a stone at a hair and not miss.

1 Samuel 17:49

And David put his hand into his bag and took from it a stone and slung it, and struck the Philistine on his forehead. And the stone sank into his forehead, so that he fell on his face to the ground.

1 Chronicles 12:29

Of the sons of Benjamin, Saul’s kinsmen, 3,000; for until now the greatest part of them had kept their allegiance to the house of Saul.

Treasury of Scripture Knowledge

Summary

They were armed with bows, and could use both the right hand and the left in hurling stones and shooting arrows out of a bow, even of Saul's brethren of Benjamin.

In hurling

Bible References

Could use

Judges 3:15
But when the sons of Israel cried to the Lord, the Lord raised up a deliverer for them, Ehud the son of Gera, the Benjamite, a left-handed man. And the sons of Israel sent tribute by him to Eglon the king of Moab.
Judges 20:16
Out of all these people 700 choice men were left-handed; each one could sling a stone at a hair and not miss.

In hurling

1 Samuel 17:49
And David put his hand into his bag and took from it a stone and slung it, and struck the Philistine on his forehead. And the stone sank into his forehead, so that he fell on his face to the ground.