James 2:17-20

17 Thus also faith by itself, if it does not have works, is dead.
18 But someone will say, "You have faith, and I have works." Show me your faith without your works, and I will show you my faith by my works.
19 You believe that there is one God. You do well. Even the demons believe--and tremble!
20 But do you want to know, O foolish man, that faith without works is dead?