2 Kings 15:33
Five and twenty years old was he when he began to reign, and he reigned sixteen years in Jerusalem. And his mother’s name was Jerusha, the daughter of Zadok.
Cross-reference
2 Kings 16:1
Historical context
2 Kings 16:1 records Ahaz succeeding Jotham after his 16-year reign.
2 Chronicles 27:1
Parallel
2 Chronicles 27:1 gives identical details of Jotham's age and reign length.