When Jehoram had established himself over his father’s kingdom, he strengthened himself by putting to the sword all his brothers along with some of the princes of Israel.
Jewish Publication Society of America Version (JPS1917) - 2 Chronicles 21:4 >Now when Jehoram was risen up over the kingdom of his father, and had strengthened himself, he slew all his brethren with the sword, and divers also of the princes of Israel.