Mark 9:26

23 And Jesus said to him, `If thou art able to believe! all things are possible to the one that is believing;`

24 and immediately the father of the child, having cried out, with tears said, `I believe, sir; be helping mine unbelief.`

25 Jesus having seen that a multitude doth run together, rebuked the unclean spirit, saying to it, `Spirit -- dumb and deaf -- I charge thee, come forth out of him, and no more thou mayest enter into him;`

26 and having cried, and rent him much, it came forth, and he became as dead, so that many said that he was dead,

27 but Jesus, having taken him by the hand, lifted him up, and he arose.

28 And he having come into the house, his disciples were questioning him by himself -- `Why were we not able to cast it forth?`

29 And he said to them, `This kind is able to come forth with nothing except with prayer and fasting.`