Voldemort had raised his wand. His head was still tilted to one side, like a curious child, wondering what would happen if he proceeded. Harry looked back into the red eyes, and wanted it to happen now, quickly, while he could still stand, before he lost control, before he betrayed fear--page 704, Harry Potter and the Deathly Hallows[link]
i. am. exhausted.
Harry Potter (c) JK Rowling