Mark 9:16

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.

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

and wherever it seizes him, it throws him down, and he foams at the mouth, and grinds his teeth, and wastes away. I asked your disciples to cast it out, and they weren't able.