Ya'akov (Jas) 2:17-20

Thus, faith by itself, unaccompanied by actions, is dead. But someone will say that you have faith and I have actions. Show me this faith of yours without the actions, and I will show you my faith by my actions! You believe that “God is one”? Good for you! The demons believe it too — the thought makes them shudder with fear! But, foolish fellow, do you want to be shown that such “faith” apart from actions is barren?