KJV:
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.
NASB:
When they had departed from him (for they left him very sick), his own servants conspired against him because of the blood of the son of Jehoiada the priest, and murdered 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.