Mark 9:16

12He said to them, “Elijah indeed comes first, and restores all things. How is it written about the Son of Man, that he should suffer many things and be despised?

13But I tell you that Elijah has come, and they have also done to him whatever they wanted to, even as it is written about him.”

14Coming to the disciples, he saw a great multitude around them, and scribes questioning them.

15Immediately all the multitude, when they saw him, were greatly amazed, and running to him, greeted him.

16He asked the scribes, “What are you asking them?”

17One of the multitude answered, “Teacher, I brought to you my son, who has a mute spirit;

18and wherever it seizes him, it throws him down; and he foams at the mouth, grinds his teeth, and becomes rigid. I asked your disciples to cast it out, and they weren’t able.”

19He answered him, “Unbelieving generation, how long shall I be with you? How long shall I bear with you? Bring him to me.”

20They brought him to him, and when he saw him, immediately the spirit convulsed him and he fell on the ground, wallowing and foaming at the mouth.