2 Kings 12:19-21

The rest of the life and times of Joash and all that he did are written in The Chronicles of the Kings of Judah. At the last his palace staff formed a conspiracy and assassinated Joash as he was strolling along the ramp of the fortified outside city wall. Jozabad son of Shimeath and Jehozabad son of Shomer were the assassins. And so Joash died and was buried in the family plot in the City of David. His son Amaziah was king after him.