What does Jeremiah 17:25 mean?

then kings and officials who sit on David's throne will come through these gates, riding in chariots and on horses, along with their officials and the people of Judah and Jerusalem. This city will always be lived in. Jeremiah 17:25 - Modern Text Bible

(If they obey, Jerusalem will thrive, and the royal line will continue. The city will be secure and full of life.)