Judges 20:31-32

31And the children of Benjamin went out against the people, and were drawn away from the city, and began to smite of the people, slaying as at the former times, in the highways, of which one leads to Bethel and the other to Gibeah in the field, about thirty men of Israel.

32And the children of Benjamin said, They are smitten down before us, as at the first. And the children of Israel said, Let us flee, that we may draw them from the city to the highways.