Judges 20:36-39

³⁶And the children of Benjamin saw that they were defeated; for the men of Israel gave place to the Benjamites, because they trusted unto those that lay in wait whom they had set against Gib'ah.

³⁷And those in ambush hastened, and spread themselves over Gib'ah; and those that lay in wait moved along, and smote all the city with the edge of the sword.

³⁸Now there was an understanding between the men of Israel and those that lay in wait, that they should make an abundance of columns of smoke rise up out of the city.

³⁹And when the men of Israel turned round in the battle, and Benjamin began to smite and kill of the men of Israel about thirty persons; for they said, Surely they are entirely defeated before us, as in the first battle: