1 Kings 22:51

Ahaziah the son of Ahab began to reign over Israel in Samaria the seventeenth year of Jehoshaphat king of Judah, and reigned two years over Israel . [Parts of two years; 2 Kings 3:1 ; and of. 2 Kings 1:17 and 2 Kings 8:16 . It is suggested that Jehoram was associated with his father in the government of Judah from the date of the expedition against Ramoth-Gilead, and this is not improbable. But it has been already remarked that these chronological notices appear to have undergone a revision which has sometimes resulted in confusion.]