James 2:17-20

Thus even faith, if it does not have works, is dead, in and of itself. Now someone may say: "You have faith, and I have works." Show me your faith without works! But I will show you my faith by means of works. You believe that there is one God. You do well. But the demons also believe, and they tremble greatly. So then, are you willing to understand, O foolish man, that faith without works is dead?