Judges 20:39-41

39the men of Israel would turn in the battle.

When the Benjamites had begun to strike them down, killing about thirty men of Israel, they said, “They are defeated before us as in the first battle.” 40But when the column of smoke began to go up from the city, the Benjamites looked behind them and saw the whole city going up in smoke.

41Then the men of Israel turned back on them, and the men of Benjamin were terrified when they realized that disaster had come upon them.