There fell eighteen thousand Namely, in the field of battle. They gleaned of them five thousand A metaphor from those who gather grapes or corn so cleanly and fully that they leave no relics for those who come after them. The Benjamites could not flee in a body, but scattered up and down the highways, where the Israelites picked up five thousand more and slew them.
Related Commentaries of Judges 20:44
Judges 20:44-45
44 And there fell of Benjamin eighteen thousand men; all these were men of valour.
45 And they turned and fled toward the wilderness unto the rock of Rimmon: and they gleaned of them in the highways five thousand men; and pursued hard after them unto Gidom, and slew two thousand men of them.