Mark 9:26 WEB

²⁴  Immediately the father of the child cried out with tears, 'I believe. Help my unbelief!'

²⁵  When Jesus saw that a multitude came running together, he rebuked the unclean spirit, saying to him, 'You mute and deaf spirit, I command you, come out of him, and never enter him again!'

²⁶  Having cried out, and convulsed greatly, it came out of him. The boy became like one dead; so much that most of them said, 'He is dead.'

²⁷  But Jesus took him by the hand, and raised him up; and he arose.

²⁸  When he had come into the house, his disciples asked him privately, 'Why couldn't we cast it out?'