15 At once the Benjamites mobilized twenty-six thousand swordsmen from their towns, in addition to seven hundred able young men from those living in Gibeah.

Read Judges 20:15 Using Other Translations

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.
And the people of Benjamin mustered out of their cities on that day 26,000 men who drew the sword, besides the inhabitants of Gibeah, who mustered 700 chosen men.
In all, 26,000 of their warriors armed with swords arrived in Gibeah to join the 700 elite troops who lived there.