Luke 9:40 in the King James Version
And I besought thy disciples to cast him out; and they could not.
Context
39 Behold, a spirit takes him, he suddenly cries out, and it convulses him so that he foams; and it hardly departs from him, bruising him severely.
40 I begged your disciples to cast it out, and they couldn’t.”
41 Jesus answered, “Faithless and perverse generation, how long shall I be with you and bear with you? Bring your son here.”