Even when they talked outside, they had to cover their mouths because the Feds brought in lip readers.
8 seconds sound clip from the Casino (1995) movie soundboard.
You can hear this line at 02:24:47 in the Blu-ray version of the movie.
Quote context
[...]
- You fuckin' moron! I'll be fillin' out paperwork for the next two months because of you!
- What are we gonna do? I'm sorry!
- Nicky found out about if from a teller who owed him money.
- He asked me again about you and the Jew's wife.
- Walk, walk, walk. What'd you say?
- He asked me again about you and the Jew's wife. (2)
- I told him I didn't know nothin'.
[...]