V. A description of the instruments that are to be employed in this service. God has raised up the spirit of the kings of the Medes (v. 11), Darius and Cyrus, who come against Babylon by a divine instinct; for God's device is against Babylon to destroy it. They do it, but God devised it, he designed it; they are but accomplishing his purpose, and acting as he directed. Note, God's counsel shall stand, and according to it all hearts shall move. Those whom God employs against Babylon are compared (v. 1) to a destroying wind, which either by its coldness blasts the fruits of the earth or by its fierceness blows down all before it. This wind is brought out of God's treasuries (v. 16), and it is here said to be raised up against those that dwell in the midst of the Chaldeans, those of other nations that inhabit among them and are incorporated with them. The Chaldeans rise up against God by falling down before idols, and against them God will raise up destroyers, for he will be too hard for those that contend with him. These enemies are compared to fanners (v. 2), who shall drive them away as chaff is driven away by the fan. The Chaldeans had been fanners to winnow God's people (ch. xv. 7) and to empty them, and now they shall themselves be in like manner despoiled and dispersed.