Mark 9:25-29 HCSB
When Jesus saw that a crowd was rapidly coming together, He rebuked the unclean spirit, saying to it, “You mute and deaf spirit, I command you: come out of him and never enter him again! ”
Then it came out, shrieking and convulsing him violently. The boy became like a corpse, so that many said, “He’s dead.” But Jesus, taking him by the hand, raised him, and he stood up.
After He went into a house, His disciples asked Him privately, “Why couldn’t we drive it out? ”
And He told them, “This kind can come out by nothing but prayer and fasting .”
HCSB: Holman Christian Standard Bible