Made a conspiracy; of which see 2 Chronicles 24:25. In the house of Millo; either in that strong and famous place in Jerusalem called Millo; of which see 2 Samuel 5:9 1 Kings 9:15,24 1 Kings 11:27; into which he possibly retired for his security, being afraid even of his own subjects and servants; or in some other place called by the same name, for some resemblance it had with it. Which goeth down to Silla, i.e. which standeth upon the descent to Silla, or upon that descending causeway which leadeth from Millo to the king's house. Some refer this to Joash, and render the place thus, they slew him at or near the house of Millo, descending, or as he was going down to Silla, to escape their hands.
Related Commentaries of 2 Kings 12:20
2 Kings 12:20
20 And his servants arose, and made a conspiracy, and slew Joash in the housee of Millo, which goeth down to Silla.