Mark 9:14-18

And when they came back to the other disciples, they saw a large crowd around them, and some scribes arguing with them.

Immediately, when the entire crowd saw Him, they were amazed and began running up to greet Him.

And He asked them, “What are you disputing with them?”

And one person from the crowd answered Him, “Teacher, I brought You my son, because he has a spirit that makes him unable to speak;

and whenever it seizes him, it slams him to the ground, and he foams at the mouth and grinds his teeth and becomes stiff. And I told Your disciples so that they would cast it out, but they could not do it.”