§ Of the Return of the Noldor The Silmarillion

Now rumour came to the camp in Hithlum of the march of Fingolfin and those that followed him, who had crossed the Grinding Ice; and all the world lay then in wonder at the coming of the Moon. But as the host of Fingolfin marched into Mithrim the Sun rose flaming in the West; and Fingolfin unfurled his blue and silver banners, and blew his horns, and flowers sprang beneath his marching feet, and the ages of the stars were ended. At the uprising of the great light the servants of Morgoth fled into Angband, and Fingolfin passed unopposed through the fastness of Dor Daedeloth while his foes hid beneath the earth. Then the Elves smote upon the gates of Angband, and the challenge of their trumpets shook the towers of Thangorodrim; and Maedhros heard them amid his torment and cried aloud, but his voice was lost in the echoes of the stone.