Judges 20:34-36

When the ten thousand choice [fighting] men from all Israel came against Gibeah, the battle was hard and fierce; but the Benjamites did not realize that disaster was about to strike them. And the LORD struck down [the tribe of] Benjamin before Israel, so that the sons of Israel destroyed twenty-five thousand one hundred men of Benjamin that day, all of whom were swordsmen. So the Benjamites realized that they were defeated. Then men of Israel gave ground to the Benjamites, because they relied on the men in ambush whom they had placed against Gibeah.