Judges 20:18-21
20:18 The Israelites went up to Bethel and asked God, “Who should lead the charge against the Benjaminites?” The Lord said, “Judah should lead.”
20:19 The Israelites got up the next morning and moved against Gibeah.
20:20 The men of Israel marched out to fight Benjamin; they arranged their battle lines against Gibeah.
20:21 The Benjaminites attacked from Gibeah and struck down twenty-two thousand Israelites that day.