For the Lord will have mercy on Jacob. God's purpose of mercy upon Israel requires, as its preliminary, the destruction of Babylon, and may be considered as the final cause of that destruction. His desire to have mercy on Israel soon is the reason why the days of Babylon are not prolonged (see Isaiah 13:22).
Will yet choose Israel. The Captivity was a rejection of Israel from their position as a favored race—God's peculiar people; their restoration was a fresh "choice" of them out of all the nations of the world, a free act of grace on his part; to which they had no claim or right whatsoever.
And set them in their own land; or, on their own ground. The land that once was theirs, but which they had forfeited by their disobedience, could only become "their own" again by a fresh gift from God.
The strangers shall be joined with them; rather, the stranger shall join himself to them. On the return from the Captivity, there would be an influx of proselytes from the nations, who would voluntarily join themselves to those whom they saw favored both by God and man (comp.
Esther 8:17). Though the Jews did not commonly seek proselytes, they readily received such as offered themselves. A further fulfillment of the prophecy took place when the Gentiles flocked into the Church of God after the coming of Christ.