2 Kings 21:23 - Joseph Benson’s Commentary on the Old and New Testaments

The servants of Amon conspired against him He having rebelled against God, his own servants rose up against him, and slew him when he had reigned only two years; and his own house, that should have been his castle of defence, was the place of his execution. He had profaned God's house with his idols, and now God suffered his own house to be polluted with his blood. How unrighteous soever they were that did it, God was righteous who suffered it to be done.