Who smote great nations, and slew mighty kings. Or "many nations" . The seven nations of the Hittites, Girgashites, Amorites, Canaanites, Perizzites, Hivites, and Jebusites; the kings of which were mighty and many, even thirty one in number, Jos 12:1.
This the Lord did by Joshua, a type of Christ; who has overcome the world by his sufferings and death, and delivered his people from it; who went forth conquering and to conquer, into the Roman Pagan empire, called the whole world, and subdued it by his Spirit and word; and will show his power in all the kingdoms of this world, either by converting or destroying them; and at last will judge all the nations and kings of the earth.
Aben Ezra interprets this of the kings of Midian, or of those next mentioned, which is best. Mybr Myywg "gentes multas", V. L.