Numbers 21:1-2

Amplified Bible, Classic Edition

21 When the Canaanite king of Arad, who dwelt in the South (the Negeb), heard that Israel was coming by the way of Atharim [the route traveled by the spies sent out by Moses], he fought against Israel and took some of them captive.

² And Israel vowed a vow to the Lord, and said, If You will indeed deliver this people into my hand, then I will utterly destroy their cities.