2 Then Israel made an oath to the Lord, and said, If you will give up this people into my hands, then I will send complete destruction on all their towns.
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.
Matthew Henry's Commentary on Numbers 21:2
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.