John Gill Commentary 2 Chronicles 25:1

"Amaziah was twenty and five years old when he began to reign; and he reigned twenty and nine years in Jerusalem: and his mother`s name was Jehoaddan, of Jerusalem." — 2 Chronicles 25:1 (ASV)

Ver. 1-4. Amaziah was twenty five years old when he began to
2 Chronicles 25:2

(See Gill on 2 Chronicles 25:1)