5.
“And Jehoram [of Israel] reigned in his [Ahaziah’s] stead, in the second year of Jehoram the son of Jehoshaphat” (2 Kings i, 17).
If Ahaziah died and Jehoram of Israel became king in the second year of Jehoram of Judah, Jehoshaphat therefore died two years before Ahaziah died.