(Polyphemos, in Odysseus' tale:) '"Hear me, Poseidon, who circle the earth, dark-haired. If truly I am your son, and you acknowledge yourself as my father, grant that Odysseus, sacker of cities, son of Laertes, who makes his home in Ithaka, may never reach that home; but if it is decided that he shall see his own people, and come home to his strong-founded house and to his own country, let him come late, in bad case, with the loss of all his companions, in someone else's ship, and find troubles in his household." 'So he spoke in prayer, and the dark-haired god heard him.' (9.528-536)
Polyphemos wants revenge. But is it justice? Zeus lets it happen—for a while, at least—so we're inclined to think that maybe it is. The question is whether it's Odysseus' punishment for blinding the guy, or for being dumb enough to reveal his name.