C. F. Keil and Franz Delitzsch on Judges 4:15-16

Jdg 4:15-16

“And the Lord discomfited Sisera, and all his chariots, and all his army, with the edge of the sword before Barak.” ויּהם, as in Exo 14:24 and Jos 10:10, denotes the confounding of the hostile army by a miracle of God, mostly by some miraculous phenomenon of nature: see, besides Exo 14:24; 2Sa 22:15; Psa 18:15, and Psa 144:6. The expression ויּהם places the defeat of Sisera and his army in the same category as the miraculous destruction of Pharaoh and of the Canaanites at Gibeon; and the combination of this verb with the expression “with the edge of the sword” is to be taken as constructio praegnans, in the sense: Jehovah threw Sisera and his army into confusion, and, like a terrible champion fighting in front of Israel, smote him without quarter, Sisera sprang from his chariot to save himself, and fled on foot; but Barak pursued the routed foe to Harosheth, and completely destroyed them. “All Sisera’s army fell by the edge of the sword; there remained not even to one,” i.e., not a single man.