Argonautica: Book 2: line 301

(2.301-310) Meanwhile the chiefs carefully cleansed the old man's squalid skin and with due selection sacrificed sheep which they had borne away from the spoil of Amycus. And when they had laid a huge supper in the hall, they sat down and feasted, and with them feasted Phineus ravenously, delighting his soul, as in a dream. And there, when they had taken their fill of food and drink, they kept awake all night waiting for the sons of Boreas. And the aged sire himself sat in the midst, near the hearth, telling of the end of their voyage and the completion of their journey:

(2.311-315) "Listen then. Not everything is it lawful for you to know clearly; but whatever is heaven's will, I will not hide. I was infatuated aforetime, when in my folly I declared the will of Zeus in order and to the end. For he himself wishes to deliver to men the utterances of the prophetic art incomplete, in order that they may still have some need to know the will of heaven.

(2.316-340) "First of all, after leaving me, ye will see the twin Cyanean rocks where the two seas meet. No one, I ween, has won his escape between them. For they are not firmly fixed with roots beneath, but constantly clash against one another to one point, and above a huge mass of salt water rises in a crest, boiling up, and loudly dashes upon the hard beach. Wherefore now obey my counsel, if indeed with prudent mind and reverencing the blessed gods ye pursue your way; and perish not foolishly by a self-sought death, or rush on following the guidance of youth. First entrust the attempt to a dove when ye have sent her forth from the ship. And if she escapes safe with her wings between the rocks to the open sea, then no more do ye refrain from the path, but grip your oars well in your hands and cleave the sea's narrow strait, for the light of safety will be not so much in prayer as in strength of hands. Wherefore let all else go and labour boldly with might and main, but ere then implore the gods as ye will, I forbid you not. But if she flies onward and perishes midway, then do ye turn back; for it is better to yield to the immortals. For ye could not escape an evil doom from the rocks, not even if Argo were of iron.

(2.341-359) "O hapless ones, dare not to transgress my divine warning, even though ye think that I am thrice as much hated by the sons of heaven as I am, and even more than thrice; dare not to sail further with your ship in despite of the omen. And as these things will fall, so shall they fall. But if ye shun the clashing rocks and come scatheless inside Pontus, straightway keep the land of the Bithynians on your right and sail on, and beware of the breakers, until ye round the swift river Rhebas and the black beach, and reach the harbour of the Isle of Thynias. Thence ye must turn back a little space through the sea and beach your ship on the land of the Mariandyni lying opposite. Here is a downward path to the abode of Hades, and the headland of Acherusia stretches aloft, and eddying Acheron cleaves its way at the bottom, even through the headland, and sends its waters forth from a huge ravine. And near it ye will sail past many hills of the Paphlagonians, over whom at the first Eneteian Pelops reigned, and of his blood they boast themselves to be.

(2.360-406) "Now there is a headland opposite Helice the Bear, steep on all sides, and they call it Carambis, about whose crests the blasts of the north wind are sundered. So high in the air does it rise turned towards the sea. And when ye have rounded it broad Aegialus stretches before you; and at the end of broad Aegialus, at a jutting point of coast, the waters of the river Halys pour forth with a terrible roar; and after it his flowing near, but smaller in stream, rolls into the sea with white eddies. Onward from thence the bend of a huge and towering cape reaches out from the land, next Thermodon at its mouth flows into a quiet bay at the Themiscyreian headland, after wandering through a broad continent. And here is the plain of Doeas, and near are the three cities of the Amazons, and after them the Chalybes, most wretched of men, possess a soil rugged and unyielding sons of toil, they busy themselves with working iron. And near them dwell the Tibareni, rich in sheep, beyond the Genetaean headland of Zeus, lord of hospitality. And bordering on it the Mossynoeci next in order inhabit the well-wooded mainland and the parts beneath the mountains, who have built in towers made from trees their wooden homes and well-fitted chambers, which they call Mossynes, and the people themselves take their name from them. After passing them ye must beach your ship upon a smooth island, when ye have driven away with all manner of skill the ravening birds, which in countless numbers haunt the desert island. In it the Queens of the Amazons, Otrere and Antiope, built a stone temple of Ares what time they went forth to war. Now here an unspeakable help will come to you from the bitter sea; wherefore with kindly intent I bid you stay. But what need is there that I should sin yet again declaring everything to the end by my prophetic art? And beyond the island and opposite mainland dwell the Philyres: and above the Philyres are the Macrones, and after them the vast tribes of the Becheiri. And next in order to them dwell the Sapeires, and the Byzeres have the lands adjoining to them, and beyond them at last live the warlike Colchians themselves. But speed on in your ship, till ye touch the inmost bourne of the sea. And here at the Cytaean mainland and from the Amarantine mountains far away and the Circaean plain, eddying Phasis rolls his broad stream to the sea. Guide your ship to the mouth of that river and ye shall behold the towers of Cytaean Aeetes and the shady grove of Ares, where a dragon, a monster terrible to behold, ever glares around, keeping watch over the fleece that is spread upon the top of an oak; neither by day nor by night does sweet sleep subdue his restless eyes."