Judges 20:39

And when the men of Israel retired in the battle
Which is before expressed by their fleeing, and giving place to the Benjaminites, and was only an artifice of theirs, to draw them off from the city:

Benjamin began to smite and kill of the men of Israel about thirty
persons;
which was done in the highways leading to Shiloh and Gibeah in the field, ( Judges 20:31 )

for they said, surely they are smitten down before us as in the first
battle;
when the greater number of the Israelites were slain by them.