Luke 9:38-40

38A man from the crowd shouted to him. ‘Teacher, please, I ask you to help my son. He is my only child.

39Sometimes a bad spirit takes hold of him and then he screams. The spirit throws his body first one way then another and water comes out of his mouth. The spirit gives him a lot of pain and it does not leave him alone very much.

40I asked your disciples to send the bad spirit out of him. But they could not do it.’