Mark 9:20-25

So the followers brought him to Jesus. As soon as the evil spirit saw Jesus, it made the boy lose control of himself, and he fell down and rolled on the ground, foaming at the mouth. Jesus asked the boy’s father, “How long has this been happening?” The father answered, “Since he was very young. The spirit often throws him into a fire or into water to kill him. If you can do anything for him, please have pity on us and help us.” Jesus said to the father, “You said, ‘If you can!’ All things are possible for the one who believes.” Immediately the father cried out, “I do believe! Help me to believe more!” When Jesus saw that a crowd was quickly gathering, he ordered the evil spirit, saying, “You spirit that makes people unable to hear or speak, I command you to come out of this boy and never enter him again!”