Jehoiachin was eighteen years old when he became king, and he reigned in Jerusalem three months and ten days. And he did evil in the sight of the LORD.
Jewish Publication Society of America Version (JPS1917) - 2 Chronicles 36:9 >Jehoiachin was eight years old when he began to reign; and he reigned three months and ten days in Jerusalem; and he did that which was evil in the sight of the LORD.