Judges 20:36-39

³⁶So the children of Benjamin saw that they were overcome: and the men of Israel had given way before Benjamin, putting their faith in the watchers who were to make the surprise attack on Gibeah.

³⁷And the watchers, rushing on Gibeah and overrunning it, put all the town to the sword without mercy.

³⁸Now the sign fixed between the men of Israel and those making the surprise attack was that when they made a pillar of smoke go up from the town,

³⁹The men of Israel were to make a turn about in the fight. And Benjamin had overcome and put to death about thirty of the men of Israel, and were saying, Certainly they are falling back before us as in the first fight.