Jeremiah 3:18

In those days... — As with Isaiah (Isaiah 11:13), so with Jeremiah, the hope, however distant, of national reformation was bound up with that of a restoration of national unity. The healing of the long-standing breach between Israel and Judah, coeval almost with the commencement of Israel as a people, was to be the glory of the Messiah’s kingdom.

Out of the land of the north. — The thoughts of the prophet turn chiefly to the land of the exile of the ten tribes; but his words imply that he foresees a like exile also in the north for Judah. In that far-off land the house of Judah shall walk to (rather than with) the house of Israel, seeking its alliance, asking for reconciliation, and both should once again dwell in the land of their inheritance.