§ Of Túrin Turambar The Silmarillion

And even as he sat there Mablung with a company of Grey-elves came over the Crossings of Teiglin, and he knew Túrin, and hailed him, and was glad indeed to find him yet living; for he had learned of the coming forth of Glaurung and that his path led to Brethil, and also he had heard report that the Black Sword of Nargothrond now dwelt there. Therefore he came to give warning to Túrin, and help if need be; but Túrin said: 'You come too late. The Dragon is dead.'