8.
“And Jehoshaphat the son of Asa began to reign over Judah in the fourth year of Ahab king of Israel” (1 Kings xxii, 41).
If Ahab reigned twenty-two years and Jehoshaphat began to reign in the fourth year of Ahab’s reign, Jehoshaphat had reigned eighteen years when Ahab died, and twenty years when Ahaziah died. As Jehoshaphat reigned twenty-five years, he therefore died five years after Ahaziah died.
9.
“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” (1 Kings, xxii, 51).
If Ahaziah began to reign in the seventeenth year of Jehoshaphat and reigned two years before he died, he died in the nineteenth year of Jehoshaphat’s reign. As Jehoshaphat reigned twenty-five years, he therefore died six years after Ahaziah died.