The Iliad 22.186–200

rouseth from his covert the fawn of a deer and chaseth him through glens and glades, and though he escape for a time, cowering beneath a thicket, yet doth the hound track him out and run ever on until he find him; even so Hector escaped not the swift-footed son of Peleus. Oft as he strove to rush straight for the Dardanian gates to gain the shelter of the well-built walls, if so be his fellows from above might succour him with missiles, so oft would Achilles be beforehand with him and turn him back toward the plain, but himself sped on by the city's walls. And as in a dream a man availeth not to pursue one that fleeth before him— the one availeth not to flee, nor the other to pursue—even so Achilles availed not to overtake Hector in his fleetness, neither Hector to escape. And how had Hector escaped the fates of death, but that Apollo, albeit for the last and latest time, drew nigh him to rouse his strength and make swift his knees?