Mark 9:14-17

And when he came to his disciples, he saw a great multitude about them, and the scribes questioning with them. And straightway all the people, when they beheld him, were greatly amazed, and running to him saluted him. And he asked the scribes, What question ye with them? And one of the multitude answered and said, Master, I have brought unto thee my son, which hath a dumb spirit