2 Chronicles 33:21
Amon was two and twenty years old when he began to reign, and reigned two years in Jerusalem.
Cross-reference
2 Chronicles 33:1
Parallel
2 Chronicles 33:1 gives Manasseh's age and reign length in the same formula as Amon's — direct structural parallel.
2 Kings 21:19
Parallel
2 Kings 21:19 provides the same details plus Amon's mother's name, a parallel historical account.
1 Chronicles 3:14
Historical context
1 Chronicles 3:14 places Amon in the royal genealogy, confirming his lineage as son of Manasseh and father of Josiah.