יהושע, פרק י״ג, פסוק כ״ז

When dividing the land among the tribes in this region, the borders were not drawn in straight, simple lines. Instead, the territories belonging to the tribes of Gad and Reuben were heavily intertwined. While some of these land grants extended westward all the way to the Jordan River, others did not [ביאור שטיינזלץ].

When establishing the boundary along the Jordan River, the primary approach among commentators is that this included not just the river itself, but its entire surrounding domain. This meant that the cities built directly on the riverbanks were incorporated into the tribal territory. As the border continued toward the edge of the Sea of Galilee, the lake itself was not given to the tribe of Gad. Rather, the Sea of Galilee belonged exclusively to the territories of the tribes that settled along its western shore [ביאור שטיינזלץ].