Numbers 34:3-5

3Then your south side shall be from the wilderness of Zin alongside of Edom, and your southern border shall be from the end of the salt sea eastward;

4and your border shall turn from the south of the ascent of Akrabbim, and pass on to Zin, and shall end southward at Kadesh-barnea, and shall go on to Hazar-Addar, and pass on to Azmon.

5And the border shall turn from Azmon unto the torrent of Egypt, and shall end at the sea.