Kitto's Popular Cyclopedia of Biblial Literature
Ab´arim, a mountain, or rather chain of mountains, which form or belong to the mountainous district east of the Dead Sea and the lower Jordan. It presents many distinct masses and elevations, commanding extensive views of the country west of the river. From one of the highest of these, called Mount Nebo, Moses surveyed the Promised Land before he died. From the manner in which the names Abarim, Nebo, and Pisgah are connected (Deuteronomy 32:49, 'Get thee up into this mountain Abarim, unto Mount Nebo;' and Deuteronomy 34:1, 'Unto the mountain of Nebo, to the top of Pisgah'), it would seem that Nebo was a mountain of the Abarim chain, and that Pisgah was the highest and most commanding peak of that mountain. The loftiest mountain of the neighborhood is Mount Attarus, about ten miles north of the Arnon; and travelers have been disposed to identify it with Mount Nebo. It is represented as barren, its summit being marked by a wild pistachio-tree overshadowing a heap of stones.
Kitto, John, ed. Entry for 'Abarim'. "Kitto's Popular Cyclopedia of Biblial Literature". https://www.studylight.org/encyclopedias/eng/kbe/a/abarim.html.