Perhaps the end of Jehoash’s life is also recorded here to highlight that Amaziah still lived for fifteen more years after this (see 2 Kings 14:17). To prepare that announcement, the end of Jehoash’s life is being noted here. For his successor, his son Jeroboam, see 2 Kings 14:23–29.
16 And Jehoash slept with his fathers and was buried in Samaria with the kings of Israel, and Jeroboam his son reigned in his place.