John Gills Exposition of the Bible Commentary - Isaiah 21:17
And the residue of the number of archers ,.... Or of "bow" F7 מספר קשת "numeri arcus", Montanus, Cocceius. , for "bows": that is, of men that use the bow, or are expert at it, as the Kedarenes were, both for taking wild beasts, and fighting with men, in which they followed their original ancestor Ishmael, Genesis 21:20 the number of these archers it seems had been great, but would be lessened by the calamity threatened; and those that would escape that, and be preserved from it,... read more
Matthew Henry's Complete Commentary - Isaiah 21:13-17
Arabia was a large country, that lay eastward and southward of the land of Canaan. Much of it was possessed by the posterity of Abraham. The Dedanim, here mentioned (Isa. 21:13), descended from Dedan, Abraham's son by Keturah; the inhabitants of Tema and Kedar descended from Ishmael, Gen. 25:3, 13, 15. The Arabians generally lived in tents, and kept cattle, were a hardy people, inured to labour; probably the Jews depended upon them as a sort of a wall between them and the more warlike eastern... read more