He will raise a signal for the nations and will assemble the banished of Israel, and gather the dispersed of Judah from the four corners of the earth.
12. And he will lift up an ensign to the nations. This verse contains nothing more than the explanation of the former verse. The language is metaphorical, and admits of two meanings; either that, by giving an ensign, he will terrify adversaries, so that they will not dare to prevent his people from returning, or that he will give an ensign to the wretched exiles...
We have here a further prophecy of the enlargement and advancement of the kingdom of the Messiah, under the type and figure of the flourishing condition of the kingdom of Judah in the latter end of Hezekiah's reign, after the defeat of Sennacherib. I.
Commenting on Isaiah 11:10-16
And he shall set up an ensign for the nations,.... For the gathering of them, for the calling of the Gentiles, that is, the Lord would do it; he who before is said to set his hand a second time to recover his people, whether among Jews or Gentiles; this he has done in the ministration of the Gospel, in which Christ is lifted up...