Numbers 33:40

33:40 The king of Arad, the Canaanite king who lived in the south of the land of Canaan, heard about the approach of the Israelites.

Numbers 21:1

Victory at Hormah

21:1 When the Canaanite king of Arad who lived in the Negev heard that Israel was approaching along the road to Atharim, he fought against Israel and took some of them prisoner.