§ Of the Sindar The Silmarillion

And when Thingol came again to Menegroth he learned that the Orc-host in the west was victorious, and had driven Círdan to the rim of the sea. Therefore he withdrew all his people that his summons could reach within the fastness of Neldoreth and Region, and Melian put forth her power and fenced all that dominion round about with an unseen wail of shadow and bewilderment: the Girdle of Melian, that none thereafter could pass against her will or the will of King Thingol, unless one should come with a power greater than that of Melian the Maia. And this inner land, which was long named Eglador, was after called Doriath, the guarded kingdom, Land of the Girdle. Within it there was yet a watchful peace; but without there was peril and great fear, and the servants of Morgoth roamed at will, save in the walled havens of the Falas.