The Silmarillion

Now Melkor came to Avathar and sought her out; and he put on again the form that he had worn as the tyrant of Utumno: a dark Lord, tall and terrible. In that form he remained ever after. There in the black shadows, beyond the sight even of Manwë in his highest halls, Melkor with Ungoliant plotted his revenge. But when Ungoliant understood the purpose of Melkor, she was torn between lust and great fear; for she was loath to dare the perils of Aman and the power of the dreadful Lords, and she would not stir from her hiding. Therefore Melkor said to her: 'Do as I bid; and if thou hunger still when all is done, then I will give thee whatsoever thy lust may demand. Yea, with both hands.' Lightly he made this vow, as he ever did; and he laughed in his heart. Thus did the great thief set his lure for the lesser.

A cloak of darkness she wove about them when Melkor and Ungoliant set forth; an Unlight, in which things seemed to be no more, and which eyes could not pierce, for it was void. Then slowly she wrought her webs: rope by rope from cleft to cleft, from jutting rock to pinnacle of stone, ever climbing upwards, crawling and clinging, until at last she reached the very summit of Hyarmentir, the highest mountain in that region of the world, far south of great Taniquetil. There the Valar were not vigilant; for west of the Pelóri was an empty land in twilight, and eastward the mountains looked out, save for forgotten Avathar, only upon the dim waters of the pathless sea. But now upon the mountain-top dark Ungoliant lay; and she made a ladder of woven ropes and cast it down, and Melkor climbed upon it and came to that high place, and stood beside her, looking down upon the Guarded Realm. Below them lay the woods of Oromë, and westward shimmered the fields and pastures of Yavanna, gold beneath the tall wheat of the gods. Bat Melkor looked north, and saw afar the shining plain, and the silver domes of Valmar gleaming in the mingling of the lights of Telperion and Laurelin. Then Melkor laughed aloud, and leapt swiftly down the long western slopes; and Ungoliant was at his side, and her darkness covered them.

Now it was a time of festival, as Melkor knew well. Though all tides and seasons were at the will of the Valar, and in Valinor there was no winter of death, nonetheless they dwelt then in the Kingdom of Arda, and that was but a small realm in the halls of Eä, whose life is Time, which flows ever from the first note to the last chord of Eru. And even as it was then the delight of the Valar (as is told in the Ainulindalë) to clothe themselves as in a vesture in the forms of the Children of Ilúvatar, so also did they eat and drink, and gather the fruits of Yavanna from the Earth, which under Eru they had made.

Therefore Yavanna set times for the flowering and the ripening of all things mat grew in Valinor; and at each first gathering of fruits Manwë made a high feast for the praising of Eru, when all the peoples of Valinor poured forth their joy in music and song upon Taniquetil. This now was the hour, and Manwë decreed a feast more glorious than any that had been held since the coming of the Eldar to Aman. For though the escape of Melkor portended toils and sorrows to come, and indeed none could tell what further hurts would be done to Arda ere he could be subdued again, at this time Manwë designed to heal the evil that had arisen among the Noldor; and all were bidden to come to his halls upon Taniquetil, there to put aside the griefs that lay between their princes, and forget utterly the lies of their Enemy. There came the Vanyar, and there came the Noldor of Tirion, and the Maiar were gathered together, and the Valar were arrayed in their beauty and majesty; and they sang before Manwë and Varda in their lofty halls, or danced upon the green slopes of the Mountain that looked west towards the Trees. In that day the streets of Valmar were empty, and the stairs of Tirion were silent; and all the land lay sleeping in peace. Only the Teleri beyond the mountains still sang upon the shores of the sea; for they recked little of seasons or times, and gave no thought to the cares of the Rulers of Arda, or the shadow that had fallen on Valinor, for it had not touched them, as yet.