Judges 20:38 DBY

³⁶  So the Benjaminites saw that they were defeated. The men of Israel gave ground to Benjamin, because they trusted to the men in ambush whom they had set against Gib'e-ah.

³⁷  And the men in ambush made haste and rushed upon Gib'e-ah; the men in ambush moved out and smote all the city with the edge of the sword.

³⁸  Now the appointed signal between the men of Israel and the men in ambush was that when they made a great cloud of smoke rise up out of the city

³⁹  the men of Israel should turn in battle. Now Benjamin had begun to smite and kill about thirty men of Israel; they said, 'Surely they are smitten down before us, as in the first battle.'

⁴⁰  But when the signal began to rise out of the city in a column of smoke, the Benjaminites looked behind them; and behold, the whole of the city went up in smoke to heaven.