C. F. Keil and Franz Delitzsch on Judges 20:35

Jdg 20:35

And Jehovah smote Benjamin before Israel (according to His promise in Jdg 20:28), so that the Israelites destroyed of Benjamin on that day twenty and five thousand and an hundred men (i.e., twenty-five thousand and upwards).

This was the result of the battle, which the historian gives at once, before entering more minutely into the actual account of the battle itself. He does this in Jdg 20:36-46 in a series of explanations, of which one is attached to the other, for the most part in the form of circumstantial clauses, so that it is not till Jdg 20:46 that he again comes to the result already announced in Jdg 20:35.The opinions expressed by De Wette, etc. that Jdg 20:35 is spurious, and by Bertheau, that Jdg 20:36-46 contain a different account of the battle, simply prove that they have overlooked this peculiarity in the Hebrew mode of writing history, viz., that the generally result of any occurrence is given as early as possible, and then the details follow afterwards; whilst these critics have not succeeded in adducing even apparent differences in support of their opinions.