The greatness of the burdens laid upon him - Meaning, probably, the heavy tribute laid upon him by the Syrians; though some think the vast sums amassed for the repairs of the temple are here intended.
Written in the story - מדרש midrash, the commentary, of the book of Kings. We have met with this before; but these works are all lost, except the extracts found in Kings, Chronicles, and Ezra. These abridgments were the cause of the neglect, and finally of the destruction, of the originals. This has been often the case in works of great consequence. Trogus Pompeius wrote a general history of the world, which he brought down to the reign of Augustus, in forty-four volumes. Justin abridged them into one volume, and the original is lost.
The greatness of the burdens laid upon him - Or, “And the multitude of burdens uttered against him.” “Burdens” (2 Kings 9:25 note) are prophetical denunciations of coming evil.
The repairing - See the marginal rendering. Joash‘s repairs extended to the very base of the temple building.
The story of the book of the kings - See the introduction to Chronicles, the second note.