Jamieson, Fausset and Brown on Daniel 2:5

5. The thing--that is, The dream, "is gone from me." Gesenius translates, "The decree is gone forth from me," irrevocable (compare Is 45:23); namely, that you shall be executed, if you do not tell both the dream and the interpretation. English Version is simpler, which supposes the king himself to have forgotten the dream. Pretenders to supernatural knowledge often bring on themselves their own punishment.

cut in pieces--(1Sa 15:33).

houses ... dunghill--rather, "a morass heap." The Babylonian houses were built of sun-dried bricks; when demolished, the rain dissolves the whole into a mass of mire, in the wet land, near the river [Stuart]. As to the consistency of this cruel threat with Nebuchadnezzar's character, see Da 4:17, "basest of men"; Jr 39:5, 6; 52:9-11.