The Silmarillion
His words were proud, and all eyes looked upon the ring; for he held it now aloft, and the green jewels gleamed there that the Noldor had devised in Valinor. For this ring was like to twin serpents, whose eyes were emeralds, and their heads met beneath a crown of golden flowers, that the one upheld and the other devoured; that was the badge of Finarfin and his house; Then Melian leaned to Thingol's side, and in whispered counsel bade him forgo his wrath. 'For not by you,' she said, 'shall Beren be slain; and far and free does his fate led him in the end, yet it is wound with yours.
Take heed!'
But Thingol looked in silence upon Luthien; and he thought in his heart: 'Unhappy Men, children of little lords and brief kings, shall such as these lay hands on you, and yet live?' Then breaking the silence he said: 'I see the ring, son of Barahir, and I perceive that you are proud, and deem yourself mighty. But a father's deeds, even had his service been rendered to me, avail not to win the daughter of Thingol and Melian. See now! I too desire a treasure that is withheld. For rock and steel and the fires of Morgoth keep the jewel that I would possess against all the powers of the Elf-kingdoms. Yet I hear you say that bonds such as these do not daunt you. Go your way therefore! Bring to me in your hand a Silmaril from Morgoth's crown; and then, if she will, Luthien may set her hand in yours. Then you shall have my jewel; and though the fate of Arda lie within the Silmarils, yet you shall hold me generous.'
Thus he wrought the doom of Doriath, and was ensnared within the curse of Mandos. And those that heard these words perceived that Thingol would save his oath, and yet send Beren to his death; for they know that not all the power of the Noldor, before the Siege was broken, had availed even to see from afar the shining Silmarils of Feanor. For they were set in the Iron Crown, and treasured in Angband above all wealth; and Balrogs were about them, and countless swords, and strong bars, and unassailable walls, and the dark majesty of Morgoth.
But Beren laughed. 'For little price,' he said, 'do Elven-kings sell their daughters: for gems, and things made by craft. But if this be your will, Thingol, I will perform it. And when we meet again my hand shall hold a Silmaril from the Iron Crown; for you have not looked the last upon Beren son of Barahir.' Then he looked in the eyes of Melian, who spoke not; and he bade farewell to Luthien Tinuviel, and bowing before Thingol and Melian he put aside the guards about him, and departed from Menegroth alone.
Then at last Melian spoke, and she said to Thingol: 'O King, you have devised cunning counsel. But if my eyes have not lost their sight, it is ill for you, whether Beren fail in his errand, or achieve it. For you have doom either your daughter, or yourself. And now is Doriath drawn within the fate of a mightier realm.' But Thingol answered: 'I sell not to Elves or Men those whom I love and cherish above all treasure. And if there were hope or fear that Beren should come ever back alive to Menegroth, he should not have looked again upon the light of heaven, though I had sworn it.'
But Luthien was silent, and from that hour she sang not again in Doriath. A brooding silence fell upon the woods, and the shadows lengthened in the kingdom of Thingol.
It is told in the Lay of Leithian that Beren passed through Doriath unhindered, and came at length to the region of the Twilight Meres, and the Fens of Sirion; and leaving Thingol's land he climbed the hills above the Falls of Sirion, where the river plunged underground with great noise. Thence he looked westward, and through the mist and rains that lay upon those hills he saw Talath Dirnen, the Guarded Plain, stretching between Sirion and Narog; and beyond he descried afar the highlands of Taur-en-Faroth that rose above Nargothrond. And being destitute, without hope or counsel, he turned his feet thither.
Upon all that plain the Elves of Nargothrond kept unceasing watch; and every hill upon its borders was crowned with hidden towers, and through all its woods and fields archers ranged secretly and with great craft. Their arrows were sure and deadly, and nothing crept there against their will. Therefore, ere Beren had come far upon his road, they were aware of him, and his death was nigh. But knowing his danger he held ever aloft the ring of Felagund; and though he saw no living thing, because of the stealth of the hunters, he felt that he was watched, and cried often aloud: 'I am Beren son of Barahir, friend of Felagund. Take me to the King!' Therefore the hunters slew him not, but assembling they waylaid him, and commanded him to halt. But seeing the ring they bowed before him, though he was in evil plight, wild and wayworn; and they led hi northward and westward, going by night lest their paths should be revealed. For at that time there was no ford or bridge over the torrent of Narog before the gates of Nargothrond; but further to the north, where Ginglith joined Narog, the flood was less, and crossing there and turning again southward the Elves led Beren under the light of the moon to the dark gates of their hidden halls.
Thus Beren came before King Finrod Felagund; and Felagund knew him, needing no ring to remind him of the kin of Beor and of Barahir. Behind closed doors they sat, and Beren told of the death of Barahir, and of all that had befallen hi in Doriath; and he wept, recalling Luthien and their joy together. But Felagund heard his tale in wonder and disquiet; and he knew that the oath he had sworn was come upon him for his death, as long before he had foretold to Galadriel. He spoke then to Beren in heaviness of heart. 'It is plain that Thingol desires your death; but it seems that this doom goes beyond his purpose, and that the Oath of Feanor is again at work. For the Silmarils are cursed with an oath of hatred, and he that even names them in desire moves a great power from slumber; and the sons of Feanor would lay all the Elf-kingdoms in ruin rather than suffer any other than themselves to win or possess a Silmaril, for the Oath drives them. And now Celegorm and Curufin are dwelling in my halls; and though I, Finarfin's son, am King, they have won a strong power in the realm, and lead many of their own people. They have shown friendship to me in every need, but I fear that they will show neither love nor mercy to you, if your quest be told. Yet my own oath holds; and thus we are all ensnared.'
Then King Felagund spoke before his people, recalling the deeds of Barahir, and his vow and he declared that it was laid upon him to aid the son of Barahir in his need, and he sought the help of his chieftains. Then Celegorm arose amid the throng, and drawing his sword he cried: 'Be he friend or foe, whether demon of Morgoth, of Elf, or child of Men, or any other living thing in Arda, neither law, nor love, nor league of hell, nor might of the Valar, nor any power of wizardry, shall defend him from the pursuing hate of Feanor's sons, if he take or find a Silmaril and keep it. For the Silmarils we alone claim, until the world ends.'