Luke 9:38-40
9:38 Then a man from the crowd cried out, “Teacher, I beg you to look at my son – he is my only child!
9:39 A spirit seizes him, and he suddenly screams; it throws him into convulsions and causes him to foam at the mouth. It hardly ever leaves him alone, torturing him severely.
9:40 I begged your disciples to cast it out, but they could not do so.”