Jeremiah 3:18
In those days the house of Judah shall walk with the house of Israel, and they shall come together out of the land of the north to the land that I have given for an inheritance unto your fathers. In those days the house of Judah shall walk with the house of Israel, and they shall come together out of the land of the north to the land that I have given for an inheritance unto your fathers.
In those days Judah and Israel will be reunited and walk together as one people. They will come together out of the land of the north back to the inheritance given to their fathers. This united return belongs to Israel's restoration when they turn back to God. That restoration serves a larger purpose, in which the transforming grace first entrusted to one nation spreads outward to all nations, both Jew and Gentile.