Matthew 21:21-22

21Jesus said to them, ‘I tell you this: You must believe in God. You must not have other ideas in your mind. If you believe in God, then you could also do the same thing to this fig tree. You could even say to this mountain, “Move away and throw yourself into the sea!” Then it would really happen.

22So when you pray to ask God for something, believe in him. Then God will give you whatever you ask for.’