All the Benjaminites who died that day were 25,000 armed men; all were warriors.
Judges 20:46 In-Context
Eighteen thousand Benjamites fell, all of them valiant fighters.
As they turned and fled toward the wilderness to the rock of Rimmon, the Israelites cut down five thousand men along the roads. They kept pressing after the Benjamites as far as Gidom and struck down two thousand more.
On that day twenty-five thousand Benjamite swordsmen fell, all of them valiant fighters.
But six hundred of them turned and fled into the wilderness to the rock of Rimmon, where they stayed four months.
The men of Israel went back to Benjamin and put all the towns to the sword, including the animals and everything else they found. All the towns they came across they set on fire.