Judges 20:40

But when the flame began to arise up out of the city with a pillar of smoke, the Benjamites looked behind them, and, behold, the flame of the city ascended up to heaven.

Cross-reference

Joshua 8:20 describes the same ambush tactic — smoke from the city signals the trap, causing panic.

In Genesis 19:28, Abraham sees smoke from Sodom's destruction — here the smoke from Gibeah signals similar divine judgment on Benjamin.