4 passes along to Azmon, goes out by the Wadi of Egypt, and comes to its end at the sea. This shall be your south boundary.

Matthew Henry's Commentary on Joshua 15:4

Commentary on Joshua 15:1-12

(Read Joshua 15:1-12)

Joshua allotted to Judah, Ephraim, and the half of Manasseh, their inheritances before they left Gilgal. Afterwards removing to Shiloh, another survey was made, and the other tribes had their portion assigned. In due time all God's people are settled.