Book of Joel Chapter 3 Vs. 7

 The Lord Judges the Nations

Behold, I will raise them out of the place whither ye have sold them, and will return your recompence upon your own head: Joel 3:7

Behold, I will... That is, bring them back to their own land, from their places whither they have been carried captive, and where they have dwelt in obscurity, and as if theft had been buried in graves, but now should be raised up and restored. And this, their restoration will be as life from the dead. This is to be understood, not of the same persons, but of their posterity, they being the same natural body. Kimchi interprets it of them and their children; them at the resurrection of the dead, their children at the time of salvation.

Some think this had its accomplishment in Alexander and his successors, by whom the Jews, who had been detained captives in other countries, were set free.

Particularly by Demetrius, as Josephus relates: though it may be applied to the future restoration of the Jews, out of all countries, unto their own land. Or rather to the gathering together the spiritual Christian, or people of God, who have been persecuted from place to place by their antichristian enemies.

and will return... Do to them as they have done to others; pay them in their own coin; retaliate the wrongs done to his people (see Rev. 13:10).

God will restore them to their land, and punish those who sold them.

In the context (cf. Joel 3:1) the passage also carries an eschatological significance which any historical fulfillment merely prefigures. From the eschatological perspective Philistia and Phoenicia represent all of Israel’s enemies (much as do Moab in Isa_25:10-12 and Edom in the Book of Oba.). At that time God’s people will gain ascendancy over their enemies (cf. Isa. 41:11-12; Amos 9:12; Oba. 1:15-21; Mic. 7:16-17; Zeph. 2:6-7).