2 Chronicles 21:1, 4, 6

Then Jehoshaphat rested with his ancestors and was buried with them in the City of David. And Jehoram his son succeeded him as king.

When Jehoram established himself firmly over his father’s kingdom, he put all his brothers to the sword along with some of the officials of Israel.

He followed the ways of the kings of Israel, as the house of Ahab had done, for he married a daughter of Ahab. He did evil in the eyes of the LORD.