2 Chronicles 21:1-6 And Jehoshaphat rested with his fathers, and was buried with his fathers in the City of David. Then Jehoram his son reigned in his place. He had brothers, the sons of Jehoshaphat: Azariah, Jehiel, Zechariah, Azaryahu, Michael, and Shephatiah; all these were the sons of Jehoshaphat king of Israel. Their father gave them great gifts of silver and gold and precious things, with fortified cities in Judah; but he gave the kingdom to Jehoram, because he was the firstborn. Now when Jehoram was established over the kingdom of his father, he strengthened himself and killed all his brothers with the sword, and also others of the princes of Israel. Jehoram was thirty-two years old when he became king, and he reigned eight years in Jerusalem. And he walked in the way of the kings of Israel, just as the house of Ahab had done, for he had the daughter of Ahab as a wife; and he did evil in the sight of the LORD.
2 Kings 9:14-15 So Jehu the son of Jehoshaphat, the son of Nimshi, conspired against Joram. (Now Joram had been defending Ramoth Gilead, he and all Israel, against Hazael king of Syria. But King Joram had returned to Jezreel to recover from the wounds which the Syrians had inflicted on him when he fought with Hazael king of Syria.) And Jehu said, “If you are so minded, let no one leave or escape from the city to go and tell it in Jezreel.”
2 Chronicles 21:12-15 And a letter came to him from Elijah the prophet, saying, Thus says the LORD God of your father David: Because you have not walked in the ways of Jehoshaphat your father, or in the ways of Asa king of Judah, but have walked in the way of the kings of Israel, and have made Judah and the inhabitants of Jerusalem to play the harlot like the harlotry of the house of Ahab, and also have killed your brothers, those of your father’s household, who were better than yourself, behold, the LORD will strike your people with a serious affliction—your children, your wives, and all your possessions; and you will become very sick with a disease of your intestines, until your intestines come out by reason of the sickness, day by day.