He was twenty-five years old when he became king, and he reigned in Jerusalem twenty-nine years. His mother's name was Jehoaddan; she was from Jerusalem.

2 Kings 14:1
In the second year of the reign of Jehoash son of Jehoahaz over Israel, Amaziah son of Joash became king of Judah.

2 Kings 14:3
And he did what was right in the eyes of the LORD, but not as his father David had done. He did everything as his father Joash had done.

2 Chronicles 25:1
Amaziah was twenty-five years old when he became king, and he reigned in Jerusalem twenty-nine years. His mother's name was Jehoaddan; she was from Jerusalem.

He was twenty and five years old when he began to reign, and reigned twenty and nine years in Jerusalem. And his mother's name was Jehoaddan of Jerusalem.