2 Kings 8:24-26

24And Joram slept with his fathers, and was buried with his fathers in the city of David; and Ahaziah his son reigned in his stead.

25In the twelfth year of Joram the son of Ahab, king of Israel, Ahaziah the son of Jehoram, king of Judah, began to reign.

26Ahaziah was twenty-two years old when he began to reign; and he reigned one year in Jerusalem; and his mother's name was Athaliah, the daughter of Omri king of Israel.