Joey Zasa: I earned that territory with my talent. The commission gave it to me and you approved.
Michael Corleone: Yes.
Vincent Mancini: Uncle Michael, I came to the party here. I'm not here to ask you for any kind of help. I could kill this bastard. He’s the one who needs the help.
Michael Corleone: So kill him. What does all this have to do with me?
Vincent Mancini: Well, he's going around your back saying "fuck Michael Corleone" all the time. That's what it has to do with you. Say it to his face one time. Say it to his face one time!
Joey Zasa: Mr. Corleone, all bastards are liars Shakespeare wrote poems about them.
Vincent Mancini: What am I gonna do with this guy. What am I gonna do with this guy!
Michael Corleone: Joey... If there is some guy running around this city saying, "fuck Michael Corleone," what do we do with a piece of shit like that? He's a fucking dog. No?
Joey Zasa: Yes, it's true. If anyone would say such a thing, they would not be a friend. They would be a dog.
Michael Corleone: My interests don't conflict with Mr. Joe Zasa's.
Vincent Mancini: You don't know how much your interests conflict with Mr. Joe Zasa's, Uncle Michael.
Connie: Michael, he needs your support Michael.
Vincent Mancini: Hey, Uncle Mike, don't make me work for this guy no more. I come work for you.
Michael Corleone: For me? As what? A tough guy? I don't need tough guys. I need more lawyers. Joey, since we have no conflicts no debts I accept your tribute. I wish you well. Vincent, make your peace with Mr. Joe Zasa.
Joey Zasa: Bastarde.
Al Neri: Vinnie for Christ’s sake, What’s the matter with you. Grt him out a here.
Vincent Mancini: Hey Uncle Mike I told Connie it wasn't the time for this.
Michael Corleone: Jesus! Shut it, shut it, shut it.
Vincent Mancini: I know you're into banks and wall street. Everyone knows you're the final word like the supreme court. I want to protect you from these guys. Your lawyers can't do that.
Michael Corleone: But you can.
Vincent Mancini: Yeah, I can do that.
Michael Corleone: And why should I be afraid of Joe Zasa?
Vincent Mancini: He knows you're stopping him from rising up in the commision. I say we make him dead. Give me the order. I'll take care of it.
Vincent Mancini: You'll take care of it?
Vincent Mancini: Yeah.
Michael Corleone: Maybe you should come with me for a few weeks. See what happens. See if you learn. Then, we'll talk about your future.
Vincent Mancini: I won't let you down.
During the airing of grievances between Vincent and Zasa in Micheal's office, Vincent bites Zasa's ear after Zasa insults him.