In context
38And a man in the crowd shouted, “Teacher, I beg you, look at my son — he is my only child. 39A spirit takes hold of him, and all at once he screams; it throws him into convulsions until he foams at the mouth, and it will hardly leave him, breaking him to pieces. 40I begged your disciples to drive it out, and they were not able to.” 41Jesus answered, “You unbelieving and twisted generation, how long must I be with you and put up with you? Bring your son here.” 42Even as the boy was coming forward, the demon hurled him down and threw him into convulsions. But Jesus rebuked the unclean spirit, healed the boy and gave him back to his father.
