2 Chronicles 24:23-25

23And it came to pass at the end of the year, that the army of the Syrians came up against him: and they came to Judah and Jerusalem, and destroyed all the princes of the people from among the people, and sent all the spoil of them unto the king of Damascus. 24For the army of the Syrians came with a small company of men; and Jehovah delivered a very great host into their hand, because they had forsaken Jehovah, the God of their fathers. So they executed judgment upon Joash.

25And when they were departed from him (for they left him very sick), his own servants conspired against him for the blood of the sons of Jehoiada the priest, and slew him on his bed, and he died; and they buried him in the city of David, but they buried him not in the sepulchres of the kings.