2 Chronicles 33:21-25

21Amon was twenty-two years old when he became king, and he reigned in Jerusalem two years. 22And he did evil in the sight of the LORD, as his father Manasseh had done.

Amon served and sacrificed to all the idols that his father Manasseh had made, 23but he did not humble himself before the LORD as his father Manasseh had done; instead, Amon increased his guilt.

24Then the servants of Amon conspired against him and killed him in his palace. 25But the people of the land killed all those who had conspired against King Amon, and they made his son Josiah king in his place.