- Mr. Pirovitch, can you keep a secret?
- On my word of honor.

3 seconds sound clip from the The Shop Around the Corner (1940) movie soundboard.

You can hear this line at 01:18:31.648 in the Blu-ray version of the movie.

Quote context

[...]

- Where's Klara? Klara! Klara! Miss Novak!

- Coming! Coming! Yes, Mr. Kralik, what is it?

- How are you today?

- Fine. Good. Now, we're expecting a terrific business today. And it's going to be tough. But don't overdo it.

- Now, Miss Novak, I wonder if I could ask a little favor of you?

- With pleasure, Mr. Pirovitch.

- I wanted to buy one of those Ochi Tchornya boxes, but Kralik tells me you took the only one that really works.

- That's right. I bought it for my boyfriend.

- Oh! Ah!

- He's coming tonight. We're going to celebrate Christmas Eve.

- Mr. Pirovitch, can you keep a secret?

- On my word of honor.

- Well, when I come back Monday, I might have a ring on my finger. Maybe, you never know.

- What? That's wonderful!

- And that's the young man who'll get the cigarette box?

- Uh-huh.

- Oh. Then let's drop the whole thing.

- You see, I thought of giving it to my wife's uncle for Christmas.

[...]