יהושע, פרק ט״ו, פסוק ד׳

The southern boundary of the tribe of Judah traces a sweeping path across the landscape, marking the final stretch of their allotted territory. Starting from the region of the Dead Sea, the line winds westward until it meets the Mediterranean Sea [ביאור שטיינזלץ]. This continuous route reveals that Judah's land, situated in the south, spans the entire width of the Land of Israel from east to west [רש"י, מצודת דוד].

As the boundary moves past Azmonah, it connects with the Brook of Egypt. Given the geographical distances and the scale of the tribal lands, this waterway is widely understood to be Wadi el-Arish rather than a branch of the Nile River [ביאור שטיינזלץ]. Reaching the brook marks the exact meeting point where the borderline veers inward. From there, it follows the circular movement of the water, creating a distinct angle along the path [מלבי"ם]. The border continues to flow alongside the Brook of Egypt until it comes to its absolute end at the Mediterranean Sea [רש"י, מצודת דוד, ביאור שטיינזלץ].

This specific line serves a dual purpose. It acts not only as the southern edge of Judah's land but also forms the definitive southern border for the entire Land of Israel [מצודת דוד]. When declaring the finality of this boundary, the narrative shifts to address the people directly, calling it "your" southern border. This sudden change in perspective stands out in a historical account otherwise told about them in the third person. The shift occurs because the text intentionally echoes the exact language God used when He originally defined the borders of the land for the Israelites [רד"ק].