Amon, son of Manasseh

“Amon was twenty-two years old when he became king, and he reigned two years in Jerusalem. But he did evil in the sight of the LORD, as his father Manasseh had done; for Amon sacrificed to all the carved images which his father Manasseh had made, and served them.” (2Ch 33:21-22, NKJV)

Manasseh's imprisonment in Babylon by the Assyrians had greatly humiliated him. He sought the LORD in deep repentance, his supplication was heard and he was restored to his kingdom in Jerusalem. He abandoned his idolatrous ways and implemented a series of reforms. However, upon succession to throne, Amon quickly swept away the apparently superficial reforms of his father. He reestablished the idols which his father had cast down, and worshipped them. The prophet Zephaniah (1:4; 3:4, 11) refers to the apostate behavior that prevailed during Amon's reign.

“Then the servants of Amon conspired against him, and killed the king in his own house. But the people of the land executed all those who had conspired against King Amon. Then the people of the land made his son Josiah king in his place.” (2Ki 21:23-24)

It is not expressly stated what the motivation of his assassins were, but the statement “the people of the land executed all those who had conspired” indicates that Amon was a victim of court intrigue rather than of a popular revolution.