C. F. Keil and Franz Delitzsch on Judges 20:31-32

Jdg 20:31-32

The Benjaminites came out again to meet the people (of Israel), and were drawn away from the town (the perfect הנתּקוּ without ו is subordinate to the preceding verb, and defines more precisely the advance itself, whilst the mode in which they were drawn away from the town is not described more fully till Jdg 20:32, Jdg 20:33), and began to smite the beaten of the people (who pretended to fly) as formerly upon the roads (where two roads part), of which one led up to Bethel and the other to Gibeah, into the field (Gibeah is the town at which the battle took place, that is to say, somewhere in the neighbourhood, so that a road might easily run from the field of battle towards the town into the field), “about (sc., putting to death) thirty men of Israel.” This statement introduces the more precise definition of the חללים.