Mark 9:14-18

When they came back to the 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 discussing with them?” And one of the crowd answered Him, “Teacher, I brought You my son, possessed with a spirit which makes him mute; and whenever it seizes him, it slams him to the ground and he foams at the mouth, and grinds his teeth and stiffens out. I told Your disciples to cast it out, and they could not do it.”