Charles H. Spurgeon on Psalms 120:5

Woe is me, that I sojourn in Mesech, that I dwell in the tents of Kedar! Mesech was a son of Japheth; and the name here signifies his descendants, the Mosques, who occupied that wild mountain region which lies between the Caspian Sea and the Black Sea. Kedar, again, was a son of Ishmael; and the name here signifies his descendants, the wandering tribes, whose "hand is against every man, and every man's hand against them." There is no geographical connection between those two nations: the former being upon the north of Palestine, and the latter upon the south. The connection is a moral one. They are mentioned together, because they were fierce and warlike barbarians. David had never lived on the shores of the Caspian Sea, or in the Arabian wilderness; and he means no more than this, that the persons with whom he now dwelt were as savage and quarrelsome as Mesech and Kedar. After a similar fashion, we call rude and troublesome persons Turks, Tartars, and Hottentots. David exclaims, I am just as miserable among these haters of peace, as if I had taken up my abode with those savage and treacherous tribes. —N. McMichael.