The Silmarillion

Then the Orcs gave chase, and the Elves after; and they overtook the Orcs and slew them ere they could harm her, but Nienor escaped them. For she fled as in a madness of fear, swifter than a deer, and tore off all her clothing as she ran, until she was naked; and she passed out of their sight, running northward, and though they sought her long they found her not, nor any trace of her. And at last Mablung in despair returned to Menegroth and told the tidings. Then Thingol and Melian were filled with grief; but Mablung went forth, and sought long in vain for tidings of Morwen and Nienor.

But Nienor ran on into the woods until she was spent, and then fell, and slept, and awoke; and it was a sunlit morning, and she rejoiced in light as it were a new thing, and all things else that she saw seemed new and strange, for she had no names for them. Nothing did she remember save a darkness that lay behind her, and a shadow of fear; therefore she went warily as a hunted beast, and became famished, for she had no food and knew not how to seek it But coming at last to the Crossings of Teiglin she passed over, seeking the shelter of the great trees of Brethil, for she was afraid, and it seemed to her that the darkness was overtaking her again from which she had fled.

But it was a great storm of thunder that came up from the south, and in terror she cast herself down upon the mound of Haudh-en-Elleth, stopping her ears from the thunder; but the rain smote her and drenched her, and she lay like a wild beast that is dying. There Turambar found her, as he came to the Crossings of Teiglin, having heard rumour of Orcs that roamed near; and seeing in a flare of lightning the body as it seemed of a slain maiden lying upon the mound of Finduilas he was stricken to the heart. But the woodmen lifted her up, and Turambar cast his cloak about her, and they took her to a lodge nearby, and warmed her, and gave her food. And as soon as she looked upon Turambar she was comforted, for it seemed to her that she had found at last something that she had sought in her darkness; and she would not be parted from him. But when he asked her concerning her name and her kin and her misadventure, then she became troubled as a child that perceives that something is demanded but cannot understand what it may be; and she wept. Therefore Turambar said: 'Do not be troubled. The tale shall wait. But I will give you a name, and I will call you Níniel, Tear-maiden.' And at that name she shook her head, but said: Níniel. That was the first word she spoke after her darkness, and it remained her name among the woodmen ever after.

On the next day they bore her towards Ephel Brandir; but when they came to Dimrost, the Rainy Stair, where the tumbling stream of Celebros fell towards Teiglin, a great shuddering came upon her, wherefore afterwards that place was called Nen Girith, the Shuddering Water. Ere she came to the home of the woodmen upon Amon Obel she was sick of a fever; and long she lay thus, tended by the women of Brethil, and they taught her language as to an infant. But ere the autumn came by the skill of Brandir she was healed of her sickness, and she could speak; but nothing did she remember of the time before she was found by Turambar on the mound of Haudh-en-Elleth. And Brandir loved her; but all her heart was given to Turambar.

In that time the woodmen were not troubled by the Orcs, and Turambar went not to war, and there was peace in Brethil. His heart turned to Níniel, and he asked her in marriage; but for that time she delayed in spite of her love. For Brandir foreboded he knew not what, and sought to restrain her, rather for her sake than his own or rivalry with Turambar; and he revealed to her that Turambar was Túrin son of Húrin, and though she knew not the name a shadow fell upon her mind.

But when three years were passed since the sack of Nargothrond Turambar asked Níniel again, and vowed that now he would wed her, or else go back to war in the wild. And Níniel took him with joy, and they were wedded at the midsummer, and the woodmen of Brethil made a great feast. But ere the end of the year Glaurung sent Orcs of his dominion against Brethil; and Turambar sat at home deedless, for he had promised to Níniel that he would go to battle only if their homes were assailed. But the woodmen were worsted, and Dorlas upbraided him that he would not aid the people that he had taken for his own. Then Turambar arose and brought forth again his black sword, and he gathered a great company of the Men of Brethil, and they defeated the Orcs utterly. But Glaurung heard tidings that the Black Sword was in Brethil, and he pondered what he heard, devising new evil.