2 Chronicles 21:12
And there came a writing to him from Elijah the prophet, saying, Thus saith the LORD God of David thy father, Because thou hast not walked in the ways of Jehoshaphat thy father, nor in the ways of Asa king of Judah, And there came a writing to him from Elijah the prophet, saying, Thus saith the LORD God of David thy father, Because thou hast not walked in the ways of Jehoshaphat thy father, nor in the ways of Asa king of Judah,
Elijah had not yet been translated when Jehoram's terrible apostasy arose in Judah, and he could not remain silent while Judah was pursuing the same course that had brought the northern kingdom to the verge of ruin, so that apostasy was not left unreproved. A written reproof was therefore sent from Elijah to Jehoram king of Judah.
Jehoram had joined himself closely to the northern kingdom by marriage to the daughter of Ahab and Jezebel. He followed Baal as the house of Ahab did, made high places in the mountains of Judah, and caused and compelled Jerusalem and Judah into unfaithfulness.
The writing came in the name of the LORD God of David his father. It charged Jehoram with not walking in the ways of Jehoshaphat his father nor in the ways of Asa king of Judah, but instead walking in the way of the kings of Israel. It further charged him with leading Judah and the inhabitants of Jerusalem into spiritual unfaithfulness after the pattern of the whoredoms of the house of Ahab. It also charged him with slaying his brethren of his father's house, who were better than himself.
The message announced punishment in which the LORD would smite his people and his children and his wives and all his goods with a great plague, and smite Jehoram himself in his own body with great sickness. Because he abandoned the ways of his father Jehoshaphat and of Asa and followed evil, that judgment came upon him and his house.
That judgment on Jehoram stands linked with the destruction of the house of Ahab and with the later divine commission to Jehu to avenge the blood of the LORD's servants and bring that house to an end. The account forms the setting for the reign of Ahaziah in Judah and his alliance with Jehoram of Israel, showing the continuing influence of Ahab's family over Judah's rulers.