36Then the Benjamites realized they had been defeated. Now the men of Israel had retreated before Benjamin because they were relying on the ambush they had set against Gibeah.
37The men in ambush rushed suddenly against Gibeah; they advanced and put the whole city to the sword.
38The men of Israel had arranged a signal with the men in ambush: When they sent up a great cloud of smoke from the city,
39the men of Israel would turn in the battle. When the Benjamites had begun to strike them down, killing about thirty men of Israel, they said, “They are defeated before us as in the first battle.”
— Judges 20:36-39