"[on the night of the Cuban government's New Year's Eve celebration; just after the countdown, he embraces Fredo and whispers to him ] There's a plane waiting to take us to Miami in an hour. I'd like you to think about it. [breaks away and suddenly grips Fredo to give him the kiss of death] I know it was you, Fredo. You broke my heart. [shakes him] You broke my heart!"
January 1, 1970
https://en.wikiquote.org/wiki/The_Godfather_Part_II