Adam Clarke on Isaiah 17:2

The cities of Aroer are forsaken "The cities are deserted for ever" - What has Aroer on the river Arnon to do with Damascus? and if there be another Aroer on the northern border of the tribe of Gad, as Reland seems to think there might be, this is not much more to the purpose. Besides, the cities of Aroer, if Aroer itself is a city, makes no good sense. The Septuagint, for ערער aroer, read עדי עד adey ad, εις τον αιωνα, for ever, or for a long duration. The Chaldee takes the word for a verb from ערה arah, translating it חרבו cherebu, devastabuntur, "they shall be wasted." The Syriac read עדועיר adoeir. So that the reading is very doubtful. I follow the Septuagint as making the plainest sense.