Your border will turn south of the Ascent of Akrabbim, proceed to Zin, and end south of Kadesh-barnea. It will go to Hazar-addar and proceed to Azmon.

The border will turn from Azmon to the Brook of Egypt, where it will end at the Mediterranean Sea.

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