Apollodorus Library 1.9.21

[21]
  Thence they put to sea and came to land at Salmydessus in Thrace, where dwelt Phineus, a seer who had lost the sight of both eyes. ¹ Some say he was a son of Agenor, ² but others that he was a son of Poseidon, and he is variously alleged to have been blinded by the gods for foretelling men the future; or by Boreas and the Argonauts because he blinded his own sons at the instigation of their stepmother; ³ or by Poseidon, because he revealed to the children of Phrixus how they could sail from Colchis to Greece. The gods also sent the Harpies to him. These were winged female creatures, and when a table was laid for Phineus, they flew down from the sky and snatched up most of the victuals, and what little they left stank so that nobody could touch it. When the Argonauts would have consulted him about the voyage, he said that he would advise them about it if they would rid him of the Harpies. So the Argonauts laid a table of viands beside him, and the Harpies with a shriek suddenly pounced down and snatched away the food. When Zetes and Calais, the sons of Boreas, saw that, they drew their swords and, being winged, pursued them through the air. Now it was fated that the Harpies should perish by the sons of Boreas, and that the sons of Boreas should die when they could not catch up a fugitive. So the Harpies were pursued and one of them fell into the river Tigres in Peloponnese, the river that is now called Harpys after her; some call her Nicothoe, but others Aellopus. But the other, named Ocypete or, according to others, Ocythoe ( but Hesiod calls her Ocypode) ⁴ fled by the Propontis till she came to the Echinadian Islands, which are now called Strophades after her; for when she came to them she turned ( estraphe) and being at the shore fell for very weariness with her pursuer. But Apollonius in the Argonautica says that the Harpies were pursued to the Strophades Islands and suffered no harm, having sworn an oath that they would wrong Phineus no more. ⁵