Kommentar zu Bamidbar 21:3

ויחרם אתהם AND HE DOOMED THEM by slaughter,

ויחרם אתהם ואת עריהם. They vowed at that time to make all this loot holy, property of the Temple Treasury, as we know they did from the beginning of the Book of Judges (Judges 1,17) [possibly the author uses the extraneous word הכנעני in that verse as the reason for linking it to the fulfillment of above vow. Clearly, the Safed mentioned there has nothing to do with the Safed in the north of the Land of Israel we are familiar with. Ed.]

Yisroel’s voice. They prayed in addition to the vow; prayer that comes from the depths of the heart is called ‘voice’.

ויקרא שם המקום חרמה, “Israel called the name of the place where this occurred: Chormah, “utter destruction.” It is not to be confused with a place by an identical name referred to in the Torah in Numbers 14,45.

ואת עריהם AND THEIR CITIES as things dedicated to the Most High.

And He delivered the Canaanites. He punished them and weakened their strength.