Read Judges 20:25 Using Other Translations
And Benjamin went forth against them out of Gibeah the second day, and destroyed down to the ground of the children of Israel again eighteen thousand men; all these drew the sword.
And Benjamin went against them out of Gibeah the second day, and destroyed 18,000 men of the people of Israel. All these were men who drew the sword.
but the men of Benjamin killed another 18,000 Israelites, all of whom were experienced with the sword.