2 Chronicles 21:3-7

Their father gave them many gifts of silver, gold, and valuable things, in addition to fortified cities in Judah; but he gave the kingdom to Jehoram because he was the firstborn. When Jehoram had ascended over the kingdom of his father and made himself secure, he killed all his brothers with the sword [to eliminate any rivals], and some of the leaders of Israel as well. Jehoram was thirty-two years of age when he became king, and he reigned eight years in Jerusalem. He walked in the way of the kings of Israel, just as the house of Ahab had done (for he married the daughter of Ahab), and he did what was evil in the sight of the LORD. Yet the LORD would not destroy the house of David because of the covenant which He had made with David, and because He had promised to give a lamp to him and to his sons forever. [2 Sam 7:12-17; 1 Kin 11:36; Ps 132:17]