3 And the Lord, in answer to the voice of Israel, gave the Canaanites up to them; and they put them and their towns completely to destruction: and that place was named Hormah.

Matthew Henry's Commentary on Numbers 21:3

Commentary on Numbers 21:1-3

(Read Numbers 21:1-3)

Before the people began their march round the country of Edom, the king of Arad, a Canaanite, who inhabited the southern part of the country, attacked them in the wilderness, and took some prisoners. This was to lead the Israelites to look more thoroughly to the Lord.