Then, why do you ask? You know everything.
2 seconds sound clip from the The Big Combo (1955) movie soundboard.
You can hear this line at 00:59:28.960 in the Blu-ray version of the movie.
Quote context
[...]
- Come here, I want to show you something.
- This is my bank. I could've built this vault in my apartment, but that would have been too obvious.
- We don't take checks, we deal strictly in cash.
- There isn't anybody I would trust with so much temptation except myself. Or maybe you.
- Who'd you see at the concert?
- Nobody.
- A nobody by the name of Diamond.
- Then, why do you ask? You know everything.
- There's one thing Mingo and Fante can't tell you: whether I still love you.
- Diamond in love? That's not possible, any more than this clever machine.
- The machine gave me a strange present.
- What was it, a pair of handcuffs?
[...]