1 In the twenty-third year of Joash the son of Ahaziah, king of Judah, Jehoahaz the son of Jehu began to reign over Israel in Samaria for seventeen years.
2 Kings 13:1 Cross References - WEB
2 Kings 8:26
26 Ahaziah was twenty-two years old when he began to reign; and he reigned one year in Jerusalem. His mother’s name was Athaliah the daughter of Omri king of Israel.
2 Kings 10:35-36
2 Kings 11:4
4 In the seventh year Jehoiada sent and fetched the captains over hundreds of the Carites and of the guard, and brought them to him into Yahweh’s house; and he made a covenant with them, and made a covenant with them in Yahweh’s house, and showed them the king’s son.
2 Kings 11:21
21 Jehoash was seven years old when he began to reign.