The Tolkien Quote Database
"You cannot pass," he said. The orcs stood still, and a dead silence fell. "I am a servant of the Secret Fire, wielder of the flame of Anor. You cannot pass. The dark fire will not avail you, flame of Udûn. Go back to the Shadow! You cannot pass."
Gandalf
J.R.R. Tolkien, The Bridge of Khazad-dûm, The Fellowship of the Ring