2 Chronicles 21:3-5

Lexham English Bible

³ And their father gave to them many gifts of silver, gold, and valuables, with fortified cities in Judah, but he gave the kingdom to Jehoram, for he was the firstborn. ⁴ When Jehoram ascended to the kingdom of his father, he strengthened himself and murdered all his brothers with the sword, and even some of the princes of Israel.

⁵ Jehoram was thirty-two years old when he became king, and he reigned eight years in Jerusalem.