“Tom Hagen: Mr. Corleone is Johnny Fontane's godfather. Now Italians regard that as a very close, a very sacred religious relationship. Jack Woltz: Tell your boss he can ask for anything else, but this is one favor I can't grant him. Tom Hagen: Mr. Corleone never asks a second favor once he's refused…”
— Mario Puzo, Francis Ford Coppola, Jack Woltz, John Marley, imdb.com