Luke 9:37-40

The next day, a massive crowd was waiting at the foot of the mountain to meet them. A man in the crowd shouted desperately, “Please, Teacher, I beg of you, do something about my son, my only son. An evil spirit possesses him and makes him scream out in torment, and hardly ever leaves him alone. It throws him into convulsions and he foams at the mouth. When it finally does leave him, he’s left with horrible bruises. I begged your disciples to drive it out of him, but they didn’t have enough power to do it.”