Charles Ellicott Commentary Jeremiah 17:25

"then shall there enter in by the gates of this city kings and princes sitting upon the throne of David, riding in chariots and on horses, they, and their princes, the men of Judah, and the inhabitants of Jerusalem; and this city shall remain for ever." — Jeremiah 17:25 (ASV)

Kings and princes. —The plural is obviously used to give greater vividness and grandeur to the picture of revived majesty which would be the reward of faithfulness, perhaps also to express the idea that the majesty would be enduring.