§ Of the Ruin of Doriath The Silmarillion

Then the Dwarves taking the Nauglamír passed out of Menegroth and fled eastwards through Region. But tidings went swiftly through the forest, and few of that company came over Aros, for they were pursued to the death as they sought the eastward road; and the Nauglamír was retaken, and brought back in bitter grief to Melian the Queen. Yet two there were of the slayers of Thingol who escaped from the pursuit on the eastern marches, and returned at last to their city far off in the Blue Mountains; and there in Nogrod they told somewhat of all that had befallen, saying that the Dwarves were slain in Doriath by command of the Elvenking, who thus would cheat them of their reward.