In 2 Chronicles in the context of the Divided Kingdom during the reign of Jehoram, king of Judah, the statement is made, “Yet the LORD was not willing to destroy the house of David because of the covenant which He had made with David, and since He had promised to give a lamp to him and his sons forever” (21:7). (The NET Bible reads, “But the LORD was unwilling to destroy David’s dynasty because of the promise he had made to give David a perpetual dynasty”).
To say that Jehoram was very wicked would be an understatement. His first act when his co-regency with his father Jehoshaphat (good king!) ended was to murder all six of his brothers! (21:4). Jehoram was married to Athaliah, the wicked daughter of Ahab and Jezebel, and greatly swayed by them. Though King of Judah, “he walked in the way of the kings of Israel, just as the house of Ahab had done” (21:6).
Our inspired historian is stating that although Jehoram deserved destruction, as had indeed been meted out to several dynasties in Israel, that Yahweh, the faithful God of the Covenant, would insure that the lineage of David would continue. The use of the word picture of a lamp which continues to burn, and is not extinguished, was a fitting metaphor. The Davidic lineage (here seen in the kings of Judah, both good and bad) would continue until the Messiah came to earth, God Incarnate. This fulfilled the promise made in 2 Samuel 7; cf. 1 Chron. 17, and etc.). Indeed, “the Scripture cannot be broken” (John 10:35).
I have earlier written about Judah’s King Jehoram here.
Leon's Message Board 