The Iliad 21.331–341

But I will hasten and rouse from the sea a fierce blast of the West Wind and the white South, that shall utterly consume the dead Trojans and their battle gear, ever driving on the evil flame; and do thou along the banks of Xanthus burn up his trees, and beset him about with fire, nor let him anywise turn thee back with soft words or with threatenings; neither stay thou thy fury, save only when I call to thee with a shout; then do thou stay thy unwearied fire.