1 In the twenty-third year of Joash son of Ahaziah king of Judah, began Jehoahaz, son of Jehu, to reign over Israel, in Samaria, [and he reigned] seventeen years.
2 Kings 13:1 Cross References - VIN
2 Kings 8:26
26 Ahaziah was twenty-two years old when he became king, and he was ruling in Jerusalem for one year. 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 the house of the LORD. He made a covenant with them, and took an oath of them in the house of the LORD, and showed them the king's son.
2 Kings 11:21
21 Joash was seven years old when he began to reign.