When the Canaanite king of Arad, who lived in the Negev, heard that Israel was coming along the road to Atharim, he attacked Israel and captured some prisoners.
1. And when king Arad the Canaanite. It is not altogether agreed among commentators who this king Arad was. Some think that he was an Amalekite, but this error is refuted by the fact that the Amalekites had already attempted in vain to interrupt the journey of the people.
Here is, 1. The descent which Arad the Canaanite made upon the camp of Israel, hearing that they came by the way of the spies; for, though the spies which Moses had sent thirty-eight years before then passed and repassed unobserved, yet their coming, and their errand, it is likely, were afterwards known to the Canaanites, gave them an alarm, and induced them to keep...
Commenting on Numbers 21:1-3
And when King Arad the Canaanite, which dwelt in the south,.... Arad seems rather to be the name of a place, city, or country, of which the Canaanite was king, than the name of a man, since we read of the king of Arad, Jos 12:14 see also Jdg 1:16 and so the Targums of Onkelos and Jerusalem here render it, the king of Arad...