§ Of the Flight of the Noldor The Silmarillion

Meanwhile Morgoth escaping from the pursuit of the Valar came to the wastes of Araman. This land lay northward between the Mountains of the Pelóri and the Great Sea, as Avathar lay to the south; but Araman was a wider land, and between the shores and the mountains were barren plains, ever colder as the Ice drew nearer. Through this region Morgoth and Ungoliant passed in haste, and so came through the great mists of Oiomúrë to the Helcaraxë, where the strait between Araman and Middle-earth was filled with grinding ice; and he crossed over, and came back at last to the north of the Outer Lands. Together they went on, for Morgoth could not elude Ungoliant, and her cloud was still about him, and all her eyes were upon him; and they came to those lands that lay north of the Firth of Drengist. Now Morgoth was drawing near to the ruins of Angband, where his great western stronghold had been; and Ungoliant perceived his hope, and knew that here he would seek to escape from her, and she stayed him, demanding that he fulfil his promise.