2 Chronicles 21:7
“Howbeit the Lord would not destroy the house of David, because of the covenant that he had made with David, and as he promised to give a light to him and to his sons for ever.”
Jehoram was thirty and two years old when he began to reign, and he reigned eight years in Jerusalem.
And he walked in the way of the kings of Israel, like as did the house of Ahab: for he had the daughter of Ahab to wife: and he wrought that which was evil in the eyes of the Lord.
Howbeit the Lord would not destroy the house of David, because of the covenant that he had made with David, and as he promised to give a light to him and to his sons for ever.
In his days the Edomites revolted from under the dominion of Judah, and made themselves a king.
Then Jehoram went forth with his princes, and all his chariots with him: and he rose up by night, and smote the Edomites which compassed him in, and the captains of the chariots.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“Yet the Lord would not destroy Judah for David his servant’s sake, as he promised him to give him alway a light, and to his children.”
“Then will I stablish the throne of thy kingdom, according as I have covenanted with David thy father, saying, There shall not fail thee a man to be ruler in Israel.”
“And all the congregation made a covenant with the king in the house of God. And he said unto them, Behold, the king’s son shall reign, as the Lord hath said of the sons of David.”
“Ought ye not to know that the Lord God of Israel gave the kingdom over Israel to David for ever, even to him and to his sons by a covenant of salt?”
“For thus saith the Lord; David shall never want a man to sit upon the throne of the house of Israel;”