What does Jeremiah 3:15 mean?

Go, and proclaim these words toward the north, and say, ‘Return, you backsliding Israel,’ says Yahweh; ‘I will not look in anger on you; for I am merciful,’ says Yahweh. ‘I will not keep anger forever.

Only acknowledge your iniquity, that you have transgressed against Yahweh your God, and have scattered your ways to the strangers under every green tree, and you have not obeyed my voice,’ says Yahweh.”

“Return, backsliding children,” says Yahweh; “for I am a husband to you. I will take one of you from a city, and two from a family, and I will bring you to Zion.

It will come to pass, when you are multiplied and increased in the land, in those days,” says Yahweh, “they will no longer say, ‘the ark of Yahweh’s covenant!’ It will not come to mind. They won’t remember it. They won’t miss it, nor will another be made.

At that time they will call Jerusalem ‘Yahweh’s Throne;’ and all the nations will be gathered to it, to Yahweh’s name, to Jerusalem. They will no longer walk after the stubbornness of their evil heart.

In those days the house of Judah will walk with the house of Israel, and they will come together out of the land of the north to the land that I gave for an inheritance to your fathers.