Judges 20:25, 35, 46-47

but the men of Benjamin killed another 18,000 Israelites, all of whom were experienced with the sword.

So the LORD helped Israel defeat Benjamin, and that day the Israelites killed 25,100 of Benjamin’s warriors, all of whom were experienced swordsmen.

So that day the tribe of Benjamin lost 25,000 strong warriors armed with swords, leaving only 600 men who escaped to the rock of Rimmon, where they lived for four months.