§ Of the Silmarils and the Unrest of the Noldor The Silmarillion

Thus with lies and evil whisperings and false counsel Melkor kindled the hearts of the Noldor to strife; and of their quarrels came at length the end of the high days of Valinor and the evening of its ancient glory. For Fëanor now began openly to speak words of rebellion against the Valar, crying aloud that he would depart from Valinor back to the world without, and would deliver the Noldor from thraldom, if they would follow him.