Rome wasn't burned in a night.
5 seconds sound clip from the American Graffiti movie soundboard.
You can hear this line at 01:23:39 in the Blu-ray version of the movie.
Quote context
[...]
- Listen, I still got some things to do. I got to find that blonde.
- Yeah, anyway, catch you tomorrow night.
- What do you mean, you guess so?
- Listen, we don't admit a lot of guys to the Pharaohs.
- Rome wasn't burned in a night.
- Yeah!
- Wolfman. Would you dedicate a record to keep me and my girlfriend together?
- Well, see, we're having a little problem.
- I'll bring you right together. Hold on a minute, man.
[...]