ציטירנדיקער פּירוש אויף במדבר 33:50

אלו הדברים, according to the plain meaning of the text the names mentioned in this verse all are names of locations, as we find that it is customary for the text of the Torah to give detail followed by further detail of the places whose exact location the Torah wishes to elaborate on in greater detail. For instance, in Genesis 12,8 when describing Avraham as pitching his tent in some place, it refers first to Beyt El, and then elaborates by saying that the he found himself with Beyt El on his east and Ai on the west. In Exodus 14,2, the Israelites are described as making a turnabout before a place described as Pi Hachirot, elaborating by saying that this Pi Hachirot is between Migdol and the sea to the north of Baal Yzefon. In Judges 21,19 an annual festival was observed at Shiloh which is described as situated north of Beyt El, east of the highway which runs from Beyt El to Shechem and south of Levonah.
If locations which did not have the distinction of serving as places where parts of the Torah were revealed to the Jewish people were described in such detail, it is not surprising that places where such parts of the Torah were revealed are described in detail. (compare Numbers 9,1, Exodus 12,1-2, Leviticus 25,1 Numbers 33,3) Here too, the locations are described with detail upon detail; they are the places that served Moses to explain the laws of the Torah, the ceremonial laws, the statutes, and the social laws. (compare 4,45-46, as well as verse 5 in our chapter.)