Mark 9:17-24

And one of the multitude answered him, Teacher, I brought unto thee my son, who hath a dumb spirit; and wheresoever it taketh him, it dasheth him down: and he foameth, and grindeth his teeth, and pineth away: and I spake to thy disciples that they should cast it out; and they were not able. And he answereth them and saith, O faithless generation, how long shall I be with you? how long shall I bear with you? bring him unto me. And they brought him unto him: and when he saw him, straightway the spirit tare him grievously; and he fell on the ground, and wallowed foaming. And he asked his father, How long time is it since this hath come unto him? And he said, From a child. And oft-times it hath cast him both into the fire and into the waters, to destroy him: but if thou canst do anything, have compassion on us, and help us. And Jesus said unto him, If thou canst! All things are possible to him that believeth. Straightway the father of the child cried out, and said, I believe; help thou mine unbelief.