2 Chronicles 24:1

Joash was seven years old when he became king, and he reigned for forty years in Jerusalem. His mother’s name was Zibiah from Beersheba.

2 Kings 11:21-15

Jehoash (Joash) was seven years old when he became king.

1 Chronicles 3:11

Joram (Jehoram) his son, Ahaziah his son, Joash his son,

Treasury of Scripture Knowledge

Summary

Joash was seven years old when he began to reign, and he reigned forty years in Jerusalem. His mother's name also was Zibiah of Beersheba.

Bible References

Joash

2 Kings 11:21
Jehoash (Joash) was seven years old when he became king.
2 Kings 12:1
In the seventh year of Jehu [king of Israel], Jehoash became king [over Judah], and he reigned forty years in Jerusalem. His mother’s name was Zibiah of Beersheba.