25 When the Arameans withdrew, they left Joash severely wounded. His officials conspired against him for murdering the son of Jehoiada the priest, and they killed him in his bed. So he died and was buried in the City of David, but not in the tombs of the kings.

Read 2 Chronicles 24:25 Using Other Translations

And when they were departed from him, (for they left him in great diseases,) 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.
When they had departed from him, leaving him severely wounded, his servants conspired against him because of the blood of the son of Jehoiada the priest, and killed him on his bed. So he died, and they buried him in the city of David, but they did not bury him in the tombs of the kings.
The Arameans withdrew, leaving Joash severely wounded. But his own officials plotted to kill him for murdering the son of Jehoiada the priest. They assassinated him as he lay in bed. Then he was buried in the City of David, but not in the royal cemetery.