Mark 9:12-21

12“Elijah does come first and restores all things,” he replied. “Why then is it written that the Son of Man must suffer many things and be treated with contempt?

13But I tell you that Elijah has come, and they did whatever they pleased to him, just as it is written about him.”

14When they came to the disciples, they saw a large crowd around them and scribes disputing with them.

15When the whole crowd saw him, they were amazed and ran to greet him.

16He asked them, “What are you arguing with them about?”

17Someone from the crowd answered him, “Teacher, I brought my son to you. He has a spirit that makes him unable to speak.

18Whenever it seizes him, it throws him down, and he foams at the mouth, grinds his teeth, and becomes rigid. I asked your disciples to drive it out, but they couldn’t.”

19He replied to them, “You unbelieving generation, how long will I be with you? How long must I put up with you? Bring him to me.”

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

21“How long has this been happening to him?” Jesus asked his father. “From childhood,” he said.