Mark 9:24-28

And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.

When Jesus saw that the people came running together, he rebuked the foul spirit, saying unto him, Thou dumb and deaf spirit, I charge thee, come out of him, and enter no more into him.

And the spirit cried, and rent him sore, and came out of him: and he was as one dead; insomuch that many said, He is dead.

But Jesus took him by the hand, and lifted him up; and he arose.

And when he was come into the house, his disciples asked him privately, Why could not we cast him out?