Mark 11:22-24

22So Jesus said to them, ‘You must believe in God.

23I tell you this: A person could say to this mountain, “Move and throw yourself into the sea.” Then it will happen like he says. But he must not let other ideas come into his mind. He must really believe that those things will happen. If he does believe it, God will do those things for him.

24So I tell you this. When you pray to ask God for anything, believe in him. Believe that you have received that thing. Then you will have whatever you have asked for.