Mark 9:16

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.”