§ Of the Voyage of Eärendil and the War of Wrath The Silmarillion

It is told among the Elves that after Eärendil had departed, seeking Elwing his wife, Mandos spoke concerning his fate; and he said: 'Shall mortal Man step living upon the undying lands, and yet live?' But Ulmo said: 'For this he was born into the world. And say unto me: whether is he Eärendil Tuor's son of the line of Hador, or the son of Idril, Turgon's daughter, of the Elven-house of Finwë?' And Mandos answered: 'Equally the Noldor, who went wilfully into exile, may not return hither.'