יהושע, פרק י״ג, פסוק ב׳

A significant portion of the Land of Israel remained outside the control of the Israelites. The inventory of these unconquered territories focuses on the southern border, sweeping from east to west [מלבי״ם]. These specific areas were left uncaptured due to a variety of political and military challenges [ביאור שטיינזלץ].

The remaining lands include the territory held by the Philistines, situated along the coastal plain [ביאור שטיינזלץ]. The primary approach among commentators is that these lands functioned as distinct districts or frontier borders. Another group occupying this unconquered southern region is the Geshurites. To avoid geographical confusion, it is clarified that this group is not the northern Aramean kingdom that shares the same name. Instead, they were a nomadic tribe that established their presence in the area between the Philistine lands and Egypt [ביאור שטיינזלץ].