2 Kings 11:21-12:3

Amplified Bible

²¹^[a]Jehoash (Joash) was seven years old when he became king.

Joash (Jehoash) Reigns over Judah

12 In the seventh year of Jehu [king of Israel], ^[b]Jehoash became king [over Judah], and he reigned forty years in Jerusalem. His mother’s name was Zibiah of Beersheba. ²Jehoash did right in the sight of the Lord all his days in which Jehoiada the priest instructed him. ³Only the high places were not removed; the people were still sacrificing and burning incense [to the Lord] on the high places [rather than at the temple].

Footnotes

2 Kings 11:21 Ch 12:1 in Hebrew.
2 Kings 12:1 Judah and Israel each had a king named Joash or Jehoash, and the Hebrew uses the two forms of the name interchangeably. Since the times of their reigns overlapped, it is easy to confuse them. The same potential confusion exists with the name Joram/Jehoram.