במדבר, פרק כ״א, פסוק י״א

The Israelites pressed forward on their journey, carefully circling the southern borders of Edom and Moab before pivoting north to travel along Moab's eastern frontier [מלבי״ם, חזקוני]. As they advanced, they arrived at a new encampment whose name reflected the harsh topography of the surrounding landscape. The primary approach among commentators is that this location was defined by its ruins, mounds, and uninhabited, desolate terrain. Conceptually, the title evokes the act of sweeping away dirt or ash, painting a picture of a ruined place that had been entirely swept clean of its inhabitants [רש״י, שפתי חכמים, מזרחי, גור אריה, נתינה לגר]. Others suggest it was a degraded area where foul water was discarded [צפנת פענח]. A different perspective views the area as synonymous with "islands," describing a deeply isolated region completely cut off from the rest of the world [חזקוני, רש״ר הירש].

Beyond its desolation, the encampment was defined by its function as a place of passage. It marked the primary route leading toward the land of Canaan and served as a definitive border separating the territory of Moab from the land of the Amorites [רש״י, שפתי חכמים, שטיינזלץ, מזרחי, גור אריה]. While this path would eventually lead the nation across Mount Nebo, a geographical debate arises regarding the immediate surroundings. Because Mount Nebo was actually three encampments away from this spot, the separation between Moab and the Amorites in this specific area likely reflects an ancient historical boundary. It represents the original dividing line that existed before Sihon, king of the Amorites, conquered these territories from Moab [חזקוני].

The precise placement of this camp was situated so that it directly overlooked the land of Moab [שטיינזלץ]. Furthermore, the directional description of the encampment indicates that the Israelites were not merely arriving from the east. Rather, their camp was located squarely within the easternmost section of Moabite territory [רש״י, מזרחי, גור אריה].