Under the similitude of a cup going round, which all the company must drink of, is here represented the universal desolation that was now coming upon that part of the world which Nebuchadrezzar, who just now began to reign and act, was to be the instrument of, and which should at length recoil upon his own country. The cup in the vision is to be a sword in the accomplishment of it: so it is explained, v. 16. It is the sword that I will send among them, the sword of war, that should be irresistibly strong and implacably cruel.