§ Akallabêth The Silmarillion

It is said by the Eldar that Men came into the world in the time of the Shadow of Morgoth, and they fell swiftly under his dominion; for he sent his emissaries among them, and they listened to his evil and cunning words, and they worshipped the Darkness and yet feared it. But there were some that turned from evil and left the lands of their kindred, and wandered ever westward; for they had heard a rumour that in the West there was a light which the Shadow could not dim. The servants of Morgoth pursued them with hatred, and their ways were long and hard; yet they came at last to the lands that look upon the Sea, and they entered Beleriand in the days of the War of the Jewels. The Edain these were named in the Sindarin tongue; and they became friends and allies of the Eldar, and did deeds of great valour in the war against Morgoth.