I thought you said you knew your business.
2 seconds sound clip from the Criss Cross (1949) movie soundboard.
You can hear this line at 00:57:59.451 in the DVD version of the movie.
Quote context
[...]
- He makes it. He's a registered druggist.
- Was.
- What's that? I can't read it.
- SiCl4.
- I thought you said you knew your business.
- Thompson, you looking for something?
- Thanks.
- I got a Ferrari motor in my job. I can take anything out.
- I wouldn't handle the money that way.
[...]