§ Of the Voyage of Eärendil and the War of Wrath The Silmarillion

But Eärendil came, shining with white flame, and about Vingilot were gathered all the great birds of heaven and Thorondor was their captain, and there was battle in the air all the day and through a dark night of doubt. Before the rising of the sun Eärendil slew Ancalagon the Black, the mightiest of the dragon-host, and cast him from the sky; and he fell upon the towers of Thangorodrim, and they were broken in his ruin. Then the sun rose, and the host of the Valar prevailed, and well-nigh all the dragons were destroyed; and all the pits of Morgoth were broken and unroofed, and the might of the Valar descended into the deeps of the earth. There Morgoth stood at last at bay, and yet unvaliant. He fled into the deepest of his mines, and sued for peace and pardon; but his feet were hewn from under him, and he was hurled upon his face. Then he was bound with the chain Angainor which he had worn aforetime, and his iron crown they beat into a collar for his neck, and his head was bowed upon his knees. And the two Silmarils which remained to Morgoth were taken from his crown, and they shone unsullied beneath the sky; and Eönwë took them, and guarded them.