Joshua 12:3

12:3 His kingdom included the eastern Arabah from the Sea of Kinnereth to the Sea of the Arabah (the Salt Sea), including the route to Beth Jeshimoth and the area southward below the slopes of Pisgah.

Joshua 18:19

18:19 It then crossed to the slope of Beth Hoglah to the north and ended at the northern tip of the Salt Sea at the mouth of the Jordan River. This was the southern border.