Joshua 15:2-4

The southern border ran from the tip of the Salt Sea south of The Tongue; it ran southward from Scorpions Pass, went around Zin and just south of Kadesh Barnea; then it ran past Hezron, ascended to Addar, and curved around to Karka; from there it passed along to Azmon, came out at the Brook of Egypt, ending at the Sea. This is the southern boundary.