§ Of the Flight of the Noldor The Silmarillion

But Olwë answered: 'We renounce no friendship. But it may be the part of a friend to rebuke a friend's folly. And when the Noldor welcomed us and gave us aid, otherwise then you spoke: in the land of Aman we were to dwell for ever, as brothers whose houses stand side by side. But as for our white ships: those you gave us not. We learned not that craft from the Noldor, but from the Lords of the Sea; and the white timbers we wrought with our own hands, and the white sails were woven by our wives and our daughters. Therefore we will neither give them nor sell them for any league or friendship. For I say to you, Fëanor son of Finwë, these are to us as are the gems of the Noldor: the work of our hearts, whose like we shall not make again.'