Judges 20:16 in the World English Bible
Among all these soldiers there were seven hundred chosen men who were left-handed. Every one of them could sling a stone at a hair and not miss.
Context
15 And the children of Benjamin were numbered at that time out of the cities twenty and six thousand men that drew sword, beside the inhabitants of Gibeah, which were numbered seven hundred chosen men.
16 Among all this people there were seven hundred chosen men lefthanded; every one could sling stones at an hair breadth, and not miss.
17 And the men of Israel, beside Benjamin, were numbered four hundred thousand men that drew sword: all these were men of war.