§ Of Beren and Lúthien The Silmarillion

And now they murmured that Finarfin's son was not as a Vala to command them, and they turned their faces from him. But the curse of Mandos came upon the brothers, and dark thoughts arose in their hearts, thinking to send forth Felagund alone to his death, and to usurp, it might be, the throne of Nargothrond; for they were of the eldest line of the princes of the Noldor.