Judges 20:37

35The LORD struck Benjamin before Israel; and the children of Israel destroyed of Benjamin that day twenty-five thousand one hundred men. All these drew the sword.

36So the children of Benjamin saw that they were struck, for the men of Israel yielded to Benjamin because they trusted the ambushers whom they had set against Gibeah.

37The ambushers hurried, and rushed on Gibeah; then the ambushers spread out, and struck all the city with the edge of the sword.

38Now the appointed sign between the men of Israel and the ambushers was that they should make a great cloud of smoke rise up out of the city.

39The men of Israel turned in the battle, and Benjamin began to strike and kill of the men of Israel about thirty persons; for they said, “Surely they are struck down before us, as in the first battle.”