2 Kings 21:1
Manasseh was twelve years old when he began to reign, and reigned fifty and five years in Jerusalem. And his mother’s name was Hephzi–bah.
Cross-reference
2 Kings 20:21 records Hezekiah's death and Manasseh's succession, providing the immediate background for Manasseh's reign beginning in 21:1.
2 Kings 22:1 gives Josiah's age at accession (8) — a parallel formula to Manasseh's (12). Both kings began as children, though their outcomes differed.
2 Chronicles 32:33 parallels the death of Hezekiah and Manasseh's succession, which precedes the reign details in 21:1.
2 Chronicles 33:1-9 opens with identical wording about Manasseh's age and reign length, then expands on his evil deeds.
2 Chronicles 33:22 says Amon did evil as his father Manasseh had done — showing Manasseh's legacy as a pattern for his son.
1 Chronicles 3:13 lists Manasseh as son of Hezekiah in the genealogical record, confirming the lineage given here.
Matthew 1:10 includes Manasseh in Jesus' genealogy, confirming his place as Hezekiah's son and king.