C. F. Keil and Franz Delitzsch on Judges 8:7

Jdg 8:7

Gideon threatened them, therefore, with severe chastisement in the event of a victorious return. “If Jehovah give Zebah and Zalmunna into my hand, I will thresh your flesh (your body) with desert thorns and thistles.” The verb דּוּשׁ, constructed with a double accusative (see Ewald, §283, .), is used in a figurative sense: “to thresh,” in other words, to punish severely. “Thorns of the desert” as strong thorns, as the desert is the natural soil for thorn-bushes. The ἁπ. λεγ. בּרקנים also signifies prickly plants, according to the early versions and the Rabbins, probably “such as grow upon stony ground” (Bertheau). The explanation “threshing machines with stones or flints underneath them,” which was suggested by J. D. Michaelis and Celsius, and adopted by Gesenius, cannot be sustained.