Luke 9:38-40

38And a man from the crowd shouted for help, “Teacher, I beg You to look at my son, because he is my only child;

39and a spirit seizes him, and suddenly he cries out, and it throws him into a convulsion so that he foams at the mouth; and only with [great] difficulty does it leave him, mauling and bruising him as it leaves.

40I begged Your disciples to cast it out, but they could not.”