The rest of the events in Joash’s reign and everything he did are recorded in The Book of the History of the Kings of Judah.
20 Joash’s officers plotted against him and assassinated him at Beth-millo on the road to Silla. 21 The assassins were Jozacar 1 son of Shimeath and Jehozabad son of Shomer - both trusted advisers. Joash was buried with his ancestors in the City of David. Then his son Amaziah became the next king.