| Barnes' Notes on the Bible These two verses (repeated from 2 Kings 13:12-13) are out of place here, where they interrupt the history of Amaziah's reign.
Clarke's Commentary on the BibleHow he fought with Amaziah - The only fighting between them was the battle already mentioned; and this is minutely related in 2 Chronicles 25:21-24.
Gill's Exposition of the Entire BibleNow the rest of the acts of Jehoash which he did, and his might,.... His valiant and mighty acts which he did in his wars with the Syrians, 2 Kings 13:25, and how he fought with Amaziah king of Judah; a short account of which is given in the preceding verses: are they not written in the book of the chronicles of the kings of Israel? a book very often mentioned and referred to, as containing the history of the events and transactions of every reign.
Keil and Delitzsch Biblical Commentary on the Old TestamentThe repetition of the notice concerning the end of the reign of Joash, together with the formula from 2 Kings 13:12 and 2 Kings 13:13, may probably be explained from the fact, that in the annals of the kings of Israel it stood after the account of the war between Jehoash and Amaziah. This may be inferred from the circumstance that the name of Joash is spelt invariably יהואשׁ here, whereas in the closing notices in 2 Kings 13:12 and 2 Kings 13:13 we have the later form יואשׁ, the one which was no doubt adopted by the author of our books. But he might be induced to give these notices once more as he found them in his original sources, from the statement in 2 Kings 14:17, that Amaziah outlived Jehoash fifteen years, seeing therein a manifestation of the grace of God, who would not destroy Amaziah notwithstanding his pride, but delivered him, through the death of his victor, from further injuries at his hands. As Amaziah ascended the throne in the second year of the sixteen years' reign of Jehoash, and before his war with Israel made war upon the Edomites and overcame them, the war with Israel can only fall in the closing years of Jehoash, and this king cannot very long have survived his triumph over the king of Judah.
Geneva Study BibleNow the rest of the acts of Jehoash which he did, and his might, and how he fought with Amaziah king of Judah, are they not written in the book of the chronicles of the kings of Israel?
Matthew Henry's Concise Commentary14:15-22 Amaziah survived his conqueror fifteen years. He was slain by his own subjects. Azariah, or Uzziah, seems to have been very young when his father was slain. Though the years of his reign are reckoned from that event, he was not fully made king till eleven years afterwards.
Matthew Henry's Whole Bible CommentaryVerses 15-22 Here are three kings brought to their graves in these few verses:-1. Joash king of Israel, v. 15, 16. We attended his funeral once before, ch. 13:12, 13. But, because the historian had occasion to give a further account of his life and actions, he again mentions his death and burial. 2. Amaziah king of Judah. Fifteen years he survived his conqueror the king of Israel, v. 17. A man may live a great while after he has been shamed, may be thoroughly mortified (as Amaziah no doubt was) and yet not dead. His acts are said to be found written in his annals (v. 18), but not his might; for his cruelty when he was a conqueror over the Edomites, and his insolence when he challenged the king of Israel, showed him void of true courage. He was slain by his own subjects, who hated him for his maladministration (v. 19) and made Jerusalem too hot for him, the ignominious breach made in their walls being occasioned by his folly and presumption. He fled to Lachish. How long he continued concealed or sheltered there we are not told, but, at last, he was there murdered, v. 19. No further did the rage of the rebels extend, for they brought him in a chariot to Jerusalem, and buried him there among his ancestors. 3. Azariah succeeded Amaziah, but not till twelve years after his father's death, for Amaziah died in the fifteenth year of Jeroboam (as appears by comparing v. 23 with v. 2), but Azariah did not begin his reign till the twenty-seventh of Jeroboam (ch. 15:1), for he was but four years old at the death of his father, so that, for twelve years, till he came to be sixteen, the government was in the hands of protectors. He reigned very long (ch. 15:2) and yet the account of his reign is here industriously huddled up, and broken off abruptly (v. 22): He built Elath (which had belonged to the Edomites, but, it is probable, was recovered by his father, v. 7), after that the king slept with his fathers, as if that had been all he did that was worth mentioning, or rather it is meant of king Amaziah: he built it soon after Amaziah died. | 
