From there it passed toward Azmon and went out to the Brook of Egypt; and the border ended at the sea. This shall be your southern border.
Joshua 15:4
Surrounding context
15:3 Then it went out to the southern side of the Ascent of Akrabbim, passed along to Zin, ascended on the south side of Kadesh Barnea, passed along to Hezron, went up to Adar, and went around to Karkaa.
15:4 From there it passed toward Azmon and went out to the Brook of Egypt; and the border ended at the sea. This shall be your southern border.
15:5 The east border was the Salt Sea as far as the mouth of the Jordan. And the border on the northern quarter began at the bay of the sea at the mouth of the Jordan.