Mark 9:19-24

19“You unbelieving generation,” Jesus replied, “how long shall I stay with you? How long shall I put up with you? Bring the boy to me.”

20So they brought him. When the spirit saw Jesus, it immediately threw the boy into a convulsion. He fell to the ground and rolled around, foaming at the mouth.

21Jesus asked the boy’s father, “How long has he been like this?” “From childhood,” he answered.

22“It has often thrown him into fire or water to kill him. But if you can do anything, take pity on us and help us.”

23“ ‘If you can’?” said Jesus. “Everything is possible for one who believes.”

24Immediately the boy’s father exclaimed, “I do believe; help me overcome my unbelief!”