Yeah, how do I know?
3 seconds sound clip from the Casino (1995) movie soundboard.
You can hear this line at 01:24:22 in the Blu-ray version of the movie.
Quote context
[...]
- I had a three-month supply. What did you do with 'em?
- You didn't have to beat him up.
- What?
- I was just trying to help him.
- Like I'm sleeping with the guy.
- I said, you can't make me stop caring about people.
[...]