Judges 20:40

40 But then the signal went up from the city - a huge column of smoke. When the Benjaminites looked back, there it was, the whole city going up in smoke.

Judges 20:40 Meaning and Commentary

Judges 20:40

But when the flame began to arise up out of the city with a
pillar of smoke
Fire being set to it by the liers in wait, who had entered it, and who made a large fire, which caused a vast pillar of flame and smoke to arise, which might be seen a great way off:

the Benjamites looked behind them;
perhaps at hearing the blowing of the trumpet, and the long sound of that:

and, behold, the flame of the city ascended up to heaven;
went upwards, and reached to a great height.

Judges 20:40 In-Context

38 The strategy for the main body of the ambush was that they send up a smoke signal from the city.

39 Then the men of Israel would turn in battle. When that happened, Benjamin had killed about thirty Israelites and thought they were on their way to victory, yelling out, "They're on the run, just as in the first battle!"

40 But then the signal went up from the city - a huge column of smoke. When the Benjaminites looked back, there it was, the whole city going up in smoke.

41 By the time the men of Israel had turned back on them, the men of Benjamin fell apart - they could see that they were trapped.

42 Confronted by the Israelites, they tried to get away down the wilderness road, but by now the battle was everywhere. The men of Israel poured out of the towns, killing them right and left,