By which, compared with 2 Kings 13:1, it may be gathered that Jehoahaz had two or three years before his death made his son Jehoash king with him; which is very probable, because he was perpetually in the state of war, and consequently in danger of an untimely death, and because he was a man of valour, as is implied here, 2 Kings 13:12, and declared 2Ch 25.
Related Commentaries of 2 Kings 13:10
2 Kings 13:10
10 In the thirty and seventh year of Joash king of Judah began Jehoash the son of Jehoahaz to reign over Israel in Samaria, and reigned sixteen years.