[Anakin has Dooku on his knees. Having cut off Dooku's hands and caught his lightsaber, Anakin is about to finish the job]
Chancellor Palpatine: [joyful] Good, Anakin, good. [suddenly turns sinister] Kill him. Kill him now. [Dooku looks shocked]
Anakin Skywalker: [hesitates] ...I shouldn't.
Chancellor Palpatine: [Angrily] Do it.
[Anakin decapitates Dooku]
Chancellor Palpatine: You did well, Anakin. He was too dangerous to be kept alive.
Anakin Skywalker: Yes, but he was an unarmed prisoner. I shouldn't have done that, it's not the Jedi way.
Chancellor Palpatine: It is only natural. He cut off your arm, and you wanted revenge. It wasn't the first time, Anakin. Remember what you told me about your mother and the Sand People?
Anakin Skywalker: [hesitates] ...I shouldn't.
Chancellor Palpatine: [Angrily] Do it.
[Anakin decapitates Dooku]
Chancellor Palpatine: You did well, Anakin. He was too dangerous to be kept alive.
Anakin Skywalker: Yes, but he was an unarmed prisoner. I shouldn't have done that, it's not the Jedi way.
Chancellor Palpatine: It is only natural. He cut off your arm, and you wanted revenge. It wasn't the first time, Anakin. Remember what you told me about your mother and the Sand People?
[Anakin has Dooku on his knees. Having cut off Dooku's hands and caught his lightsaber, Anakin is about to finish the job]
Chancellor Palpatine : [joyful] Good, Anakin, good. [suddenly turns sinister] Kill him. Kill him now. [Dooku looks shocked]
Anakin Skywalker : [hesitates] ...I shouldn't.
Chancellor Palpatine : [Angrily] Do it.
[Anakin decapitates Dooku]
Chancellor Palpatine : You did well, Anakin. He was too dangerous to be kept alive.
Anakin Skywalker : Yes, but he was an unarmed prisoner. I shouldn't have done that, it's not the Jedi way.
Chancellor Palpatine : It is only natural. He cut off your arm, and you wanted revenge. It wasn't the first time, Anakin. Remember what you told me about your mother and the Sand People?
http://www.moviequotedb.com/movies/star-wars-episode-iii-revenge-of-the-sith/quote_22591.html