Joash’s son King Amaziah of Judah lived 15 years after the death of Jehoahaz’s son King Jehoash of Israel.
In Joash’s thirty-seventh year as king of Judah, Jehoahaz’s son Jehoash began to rule Israel in Samaria. He ruled for 16 years.
Jehoash lay down in death with his ancestors and was buried with the kings of Israel in Samaria. His son Jeroboam succeeded him as king.
Isn’t everything else about Amaziah written in the official records of the kings of Judah?
Joash’s son Amaziah was in his fifteenth year as king of Judah when Jehoash’s son King Jeroboam of Israel began to rule in Samaria. Jeroboam ruled for 41 years.
In Jeroboam’s twenty-seventh year as king of Israel, Amaziah’s son Azariah began to rule as king of Judah.