You're selling fish four days old, kitty.
4 seconds sound clip from the The Big Knife (1955) movie soundboard.
You can hear this line at 01:28:26 in the Blu-ray version of the movie.
Quote context
[...]
- All right, thank you very much.
- Wait a minute. What did Smiley whisper into that phony tin trumpet?
- That she's still at the bar, being entertained by a friend of mine.
- If anything happens to her...
- You're selling fish four days old, kitty.
- Why not? For all I know, you could have some blackmail on Monty, too.
- Your client has to learn how to talk.
[...]