captivity. the captives: "captivity" being put by Figure of speech Metonymy (of Adjunct), App-6, for the captives.
this host: i.e. the whole of the twelve tribes.
shall possess. Supply the Ellipsis thus: "they who are scattered among [the Canaanites]".
even, &c. Supply "[shall possess] as far as".
Zarephath. Sarepta, belonging to Sidon and Tyre. Sepharad is mentioned with Ionia and Greece (in the west) in the inscriptions of Behistun, vol. 1, line 15. See App-57. Jews were sold as slaves, and were taken to Spain by the Phoenicians to work in the mines near the great city of Ampuria, now being unearthed, near Figueras, in the province of Gerona. The "Jews' houses" are still shown at Besalu.
the cities, &c. Jewish tradition declares for Spain.
south. After Obadiah 1:20, supply the logical Ellipsis of thought thus: "[yea. My People shall enlarge their borders on all sides], and saviours", &c.