I. The war proclaimed, and general notice given of the advance of the enemy. It is published now, some years before, by the prophet; but, since this will be slighted, it shall be published after another manner when the judgment is actually breaking in, v. 5, 6. The trumpet must be blown, the standard must be set up, a summons must be issued out to the people to gather together and to draw towards Zion, either to guard it or expecting to be guarded by it. There must be a general rendezvous. The militia must be raised and all the forces mustered. Those that are able men, and fit for service, must go into the defenced cities, to garrison them; those that are weak, and would lessen their provisions, but not increase their strength, must retire, and not stay.