2 Chronicles 24:23-25

23It came to pass that at the turn of the year, the Aramean army came up against him. They invaded Judah and Jerusalem and massacred all the chieftains of the people, and sent all their plunder to the king of Damascus.

24Although the Aramean army came with only a small number of men, Adonai gave over a much larger army into their hands, because they had forsaken Adonai, God of their fathers. So they executed judgment upon Joash.

25When they withdrew from him—for they left him very sick—his own servants plotted against him because of the blood of the sons of Jehoiada the kohen, and assassinated him on his bed. He died and was buried in the city of David—but not in the tombs of the kings.