Ahaziah the son of Ahab began to reign over Israel in Samaria
the seventeenth year of Jehoshaphat king of Judah
It is observed, that Jehoshaphat began to reign in the fourth year of Ahab, and Ahab reigned twenty two years, see ( 1 Kings 22:41 ) ( 16:29 ) , and therefore Ahab's son must begin to reign in the eighteenth year of Jehoshaphat; but perhaps he was made king in his father's lifetime, before he went on his expedition to Ramothgilead, or Ahab's reign was not twenty two years complete:
and reigned two years over Israel;
not complete, as appears from ( 2 Kings 3:1 ) .