2 Kings 12:1
In the seventh year of Jehu Jehoash began to reign; and forty years reigned he in Jerusalem. And his mother’s name was Zibiah of Beer–sheba.
Cross-reference
In 2 Kings 9:27, Ahaziah (Joash's father) is killed by Jehu — the event that led to Athaliah's usurpation and Joash's hidden childhood.
In 2 Kings 11:1, Athaliah destroys the royal family — setting the stage for Joash's survival and later crowning.
2 Kings 11:2 tells how Jehosheba rescued infant Joash, explaining how he survived to become king in 12:1.
2 Kings 11:3 recounts Jehoash's six-year hiding from Athaliah, directly preceding his coronation in 12:1.
2 Kings 11:4 describes Jehoiada's coup that made Jehoash king in the seventh year, matching the timeframe in 12:1.
2 Kings 11:21 states Jehoash began reigning at age seven, complementing the regnal summary in 12:1.
1 Chronicles 3:11 lists Joash in the Davidic genealogy, confirming his lineage referenced in 12:1.
2 Chronicles 24:1-14 is the parallel account of Jehoash's reign, including temple repairs.