Judges 20:31-32

31So the children of Benjamin went out against the people, and were drawn away from the city. They began to strike down and kill some of the people, as at the other times, in the highways (one of which goes up to Bethel and the other to Gibeah) and in the field, about thirty men of Israel.

32And the children of Benjamin said, “They are defeated before us, as at first.” But the children of Israel said, “Let us flee and draw them away from the city to the highways.”