Yet another, 'ID this quote, please.'

I can’t remember if it comes from a movie or TV show or what. What I remember - the line was spoken by the villain of the story, to a protagonist character who was double crossing him. In a very melodramatic voice, he said, “They asked you to do something that made you feel dishonest, didn’t they?”

Does anyone know where this is from?

Revenge of the Sith, perhaps?

God, THANK YOU. That’s it.