IV. The great numbers and strength of the enemy, that should invade their country and besiege their city, v. 6, 7. Elam (that is, the Persians) come with their quiver full of arrows, and with chariots of fighting men, and horsemen. Kir (that is, the Medes) muster up their arms, unsheath the sword, and uncover the shield, and get every thing ready for battle, every thing ready for the besieging of Jerusalem. Then the choice valleys about Jerusalem, that used to be clothed with flocks and covered over with corn, shall be full of chariots of war, and at the gate of the city the horsemen shall set themselves in array, to cut off all provisions from going in, and to force their way in. What a condition must the city be in that was beset on all sides with such an army!