§ Of the Coming of the Elves and the Captivity of Melkor The Silmarillion

And on a time it chanced that Oromë rode eastward in his hunting, and he turned north by the shores of Helcar and passed under the shadows of the Orocarni, the Mountains of the East. Then on a sudden Nahar set up a great neighing, and stood still. And Oromë wondered and sat silent, and it seemed to him that in the quiet of the land under the stars he heard afar off many voices singing.