Komentaryong Sumisipi para sa Mga Bilang 33:48

Because it was at Arava, etc. You should not say that Arava simply means “their place of encampment,” as it is written above in Parshas Masai (Bamidbar 33:48), “And they camped in the plains of Moav (בערבות מואב).” Otherwise, Scripture should have written, “Across the Yardein, in the Arava plain, in the wilderness (בערבה במדבר).”

וממתנה, “and from Matanah;’” they came to Nachaliel, the word being a combination of river and valley. In Numbers 33,48, the Torah refers to this as the Israelites journeying from the chain of mountains known as Harey Haavarim.” From that point onwards, the Israelites made camp in the wilderness also known as שדה מואב, “the field or fields” of Moav. This was the last place where they made camp before crossing the Jordan river into the Holy Land.

we stayed in the Gai i.e., we had already stayed in the Gai (which was near the “summit of Pisgah”), since from there we went to the plains of Mo’av. The passage is explained correctly by assuming that the Gai forms part of the hills of Avarim [Numbers 33: 48]. Moshe now begins to talk about the commandments; and, since they were across Bet-Por , he begins by discussing idolatry.