The Silmarillion

Long he spoke, and ever he urged the Noldor to follow him and by their own prowess to win freedom and great realms in the lands of the East, before it was too late; for he echoed the lies of Melkor, that the Valar had cozened them and would hold them captive so that Men might rule in Middle-earth. Many of the Eldar heard then for the first time of the Aftercomers. 'Fair shall the end be,' he cried, though long and hard shall be the road! Say farewell to bondage! But say farewell also to ease! Say farewell to the weak! Say farewell to your treasures! More still shall we make. Journey light: but bring with you your swords! For we will go further than Oromë, endure longer than Tulkas: we will never turn back from pursuit. After Morgoth to the ends of the Earth! War shall he have and hatred undying. But when we have conquered and have regained the Silmarils, then we and we alone shall be lords of the unsullied Light, and masters of the bliss and beauty of Arda. No other race shall oust us!'

Then Fëanor swore a terrible oath. His seven sons leapt straightway to his side and took the selfsame vow together, and red as blood shone their drawn swords in the glare of the torches. They swore an oath which none shall break, and none should take, by the name even of Ilúvatar, calling the Everlasting Dark upon them if they kept it not; and Manwë they named in witness, and Varda, and the hallowed mountain of Taniquetil, vowing to pursue with vengeance and hatred to the ends of the World Vala, Demon, Elf or Man as yet unborn, or any creature, great or small, good or evil, that time should bring forth unto the end of days, whoso should hold or take or keep a Silmaril from their possession.

Thus spoke Maedhros and Maglor and Celegorm, Curufin and Caranthir, Amrod and Amras, princes of the Noldor; and many quailed to hear the dread words. For so sworn, good or evil, an oath may not be broken, and it shall pursue oathkeeper and oathbreaker to the world's end. Fingolfin and Turgon his son therefore spoke against Fëanor, and fierce words awoke, so that once again wrath came near to the edge of swords. But Finarfin spoke softly, as was his wont, and sought to calm the Noldor, persuading them to pause and ponder ere deeds were done that could not be undone; and Orodreth, alone of his sons, spoke in like manner. Finrod was with Turgon, his friend; but Galadriel, the only woman of the Noldor to stand that day tall and valiant among the contending princes, was eager to be gone. No oaths she swore, but the words of Fëanor concerning Middle-earth had kindled in her heart, for she yearned to see the wide unguarded lands and to rule there a realm at her own will. Of like mind with Galadriel was Fingon Fingolfin's son, being moved also by Fëanor’s words, though he loved him little; and with Fingon stood as they ever did Angrod and Aegnor, sons of Finarfin. But these held their peace and spoke not against their fathers.

At length after long debate Fëanor prevailed, and the greater part of the Noldor there assembled he set aflame with the desire of new things and strange countries. Therefore when Finarfin spoke yet again for heed and delay, a great shout went up: 'Nay, let us be gone!' And straightway Fëanor and his sons began to prepare for the marching forth.

Little foresight could there be for those who dared to take so dark a road. Yet all was done in over-haste; for Fëanor drove them on, fearing lest in the cooling of their hearts his words should wane and other counsels yet prevail; and for all his proud words he did not forget the power of the Valar. But from Valmar no message came, and Manwë was silent. He would not yet either forbid or hinder Fëanor's purpose; for the Valar were aggrieved that they were charged with evil intent to the Eldar, or that any were held captive by them against their will. Now they watched and waited, for they did not yet believe that Fëanor could hold the host of the Noldor to his will.