2 Chronicles 24:25-26

25When the Arameans saw that Joash had many wounds, they left him. His servants conspired against him, and killed him on his bed, because he had shed the blood of the sons of the priest Jehoiada. So he died, and they buried him in the city of David, but they did not bury him in the tombs of the kings.

26Those who conspired against him were Zabad, son of the Ammonite woman Shimeath, and Jehozabad, son of the Moabite woman Shimrith.