2 Chronicles 24:1

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 Beer–sheba.

Cross-references

2 Chronicles 34:1 notes Josiah also became king as a child (age 8) — a parallel of young kings ascending the throne.

2 Kings 11:21 gives the identical account: Jehoash (Joash) was seven when he became king — a direct parallel narrative.

2 Kings 12:1 repeats the same regnal details plus synchronism with Jehu — another parallel account of Joash's accession.

1 Chronicles 3:11 lists Joash in the Davidic genealogy, confirming his place as son of Ahaziah — genealogical support.