2 Kings 15:33

15:33 He was twenty-five years old when he began to reign, and he reigned for sixteen years in Jerusalem. His mother was Jerusha the daughter of Zadok.

2 Kings 21:1

Manasseh’s Reign over Judah

21:1 Manasseh was twelve years old when he became king, and he reigned for fifty-five years in Jerusalem. His mother was Hephzibah.