§ Akallabêth The Silmarillion

This was the beginning of that people that in the Grey-elven speech are called the Dúnedain: the Númenóreans, Kings among Men. But they did not thus escape from the doom of death that Ilúvatar had set upon all Mankind, and they were mortal still, though their years were long, and they knew no sickness, ere the shadow fell upon them. Therefore they grew wise and glorious, and in all things more like to the Firstborn than any other of the kindreds of Men; and they were tall, taller than the tallest of the sons of Middle-earth; and the light of their eyes was like the bright stars. But their numbers increased only slowly in the land, for though daughters and sons were born to them, fairer than their fathers, yet their children were few.