'Sling stones' in the Bible

Uzziah provided the entire army with shields, spears, helmets, armor, bows and slingstones.

No arrow can make him flee;slingstones become like stubble to him.

The Lord of Hosts will defend them.They will consume and conquer with slingstones;they will drink and be rowdy as if with wine.They will be as full as the sprinkling basin,like those at the corners of the altar.