A couple of years in the stir seems to ripen them for the job.
5 seconds sound clip from the The Roaring Twenties (1939) movie soundboard.
You can hear this line at 00:33:10 in the DVD version of the movie.
Quote context
[...]
- Some of my best friends are in jail.
- All right, Danny. All right.
- Come on, Lloyd, let's go in the office.
- Do you have a prejudice against hiring honest citizens?
- In this booze business, you can't hire any geraniums.
- A couple of years in the stir seems to ripen them for the job.
- I tell you, he's on his way over there right now.
- Hello. Two cases, yeah. Send it right up.
- They lap it up faster than we can deliver.
[...]