Doom of Mandos

The dreadful prophecy and curse uttered by Mandos to Fëanor and the Noldor as they marched back to Middle-earth from Aman, against the will of the Valar. The prophecy foretold many things that later came to pass, especially the evil consequences of the Oath of Fëanor for himself and his Sons. So powerful were Mandos' words that Fëanor's half-brother Finarfin gave up the march, and led his people back to dwell in Valinor.