Mark 5:19

5:19 But Jesus did not permit him to do so. Instead, he said to him, “Go to your home and to your people and tell them what the Lord has done for you, that he had mercy on you.”

Mark 11:23

11:23 I tell you the truth, if someone says to this mountain, ‘Be lifted up and thrown into the sea,’ and does not doubt in his heart but believes that what he says will happen, it will be done for him.