As the door began to open, the howling of the wolves without grew louder and angrier. Their red jaws, with champing teeth, and their blunt-clawed feet as they leaped, came in through the opening door. I knew than that to struggle at the moment against the Count was useless. With such allies as these at his command, I could do nothing.
– Bram Stoker
Dracula, Chapter 4. Jonathan Harker tells Count Dracula that he wants to leave his castle. But when Dracula draws back the main door of the castle, Jonathan is horrified to find that there is a large number or wolves howling outside. Seeing he cannot really leave, he returned to his bedroom.