Joshua 15:1-4

1Now the allotment for the tribe of the descendants of Judah by their clans was in the southernmost region, south to the Wilderness of Zin and over to the border of Edom.

2Their southern border began at the tip of the Dead Sea on the south bay

3and went south of the Scorpions’ Ascent, proceeded to Zin, ascended to the south of Kadesh-barnea, passed Hezron, ascended to Addar, and turned to Karka.

4It proceeded to Azmon and to the Brook of Egypt and so the border ended at the Mediterranean Sea. This is your southern border.