2 Chronicles 24:1

A son of seven years is Joash in his reigning, and forty years he hath reigned in Jerusalem, and the name of his mother is Zibiah of Beer-Sheba.

2 Kings 11:21-15

a son of seven years is Jehoash in his reigning.

1 Chronicles 3:11

Joram 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
a son of seven years is Jehoash in his reigning.
2 Kings 12:1
In the seventh year of Jehu reigned hath Jehoash, and forty years he hath reigned in Jerusalem, and the name of his mother is Zibiah of Beer-Sheba,