Mark 9:17

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

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

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

and 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.”

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

They 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.