דברי הימים ב, פרק י״ז, פסוק י״ג

The king gathered great economic and military strength, dividing it across different regions of the kingdom. In the cities of Judah, this power took the form of intense labor and high production [ביאור שטיינזלץ]. These areas were filled with a wide variety of skilled artisans and craftsmen who dedicated themselves to specialized trades [מצודת דוד].

While the cities of Judah focused on this productive and economic growth, the capital served a different purpose. Alongside the economic production happening throughout the land, the king maintained a powerful military force of mighty warriors stationed directly in Jerusalem [ביאור שטיינזלץ].