John Calvin Reformed @genevareformer

By the word building, God means that they would return to their own country for this end — that they might remain secure in it. And this promise was very needful, since the Jews were on every side surrounded by enemies; for all their neighbors had united together against them, and were most hostile, so that they never ceased to create new troubles.

Matthew Henry Presbyterian @wholebiblehenry

Observe here, I. The date of this comfortable prophecy which God entrusted Jeremiah with. It is not exact in the time, only that it was after that in the foregoing chapter, when things were still growing worse and worse; it was the second time. God speaketh once, yea, twice, for the encouragement of his people.

Commenting on Jeremiah 33:1-9

John Gill Reformed Baptist @doctorgill

And I will cause the captivity of Judah and the captivity of Israel to return,.... Mention being made of the return of the captivity of Israel, or the ten tribes, as well as that of Judah, shows that this prophecy does not relate to the return of the Jews from their seventy years' captivity in Babylon; but is to be understood spiritually, of a release...