Luke 9:37-40

On the next day, when they came down from the mountain, a large crowd met Him. And a man from the crowd shouted, saying, “Teacher, I beg You to look at my son, for he is my only boy, and a spirit seizes him, and he suddenly screams, and it throws him into a convulsion with foaming at the mouth; and only with difficulty does it leave him, mauling him as it leaves. I begged Your disciples to cast it out, and they could not.”