In the thirty and seventh year of Joash king of Judah began Jehoash the son of Jehoahaz to reign over Israel in Samaria, and reigned sixteen years.
In the thirty and seventh year of Joash king of Judah began Jehoash ... to reign over Israel. Jehoash was associated with his father in the government three years, otherwise his reign must have been described as commencing in the fortieth year of Joash, king of Judah.