Adam Clarke on Psalms 120:5

That I sojourn in Mesech - The Chaldee has it, "Wo is me that I am a stranger with the Asiatics, (אוסאי useey), and that I dwell in the tents of the Arabs." Calmet, who understands the Psalm as speaking of the state of the captives in Babylon and its provinces, says, "Meshec was apparently the father of the Mosquians, who dwelt in the mountains that separate Iberia from Armenia, and both from Colchis. These provinces were subjugated by Nebuchadnezzar; and it is evident from 2Kgs 17:23, 2Kgs 17:24; 2Kgs 18:11; 2Kgs 19:12, 2Kgs 19:13, that many of the Jews were held in captivity in those countries. As to Kedar, it extended into Arabia Petraea, and towards the Euphrates; and is the country afterwards known as the country of the Saracens."