II Kings 12:20-21

And his servants arose and formed a conspiracy, and killed Joash in the house of the Millo, which goes down to Silla. For Jozachar the son of Shimeath and Jehozabad the son of Shomer, his servants, struck him. So he died, and they buried him with his fathers in the City of David. Then Amaziah his son reigned in his place.