Er...monsieur.
4 seconds sound clip from the Swiss Miss (1938) movie soundboard.
You can hear this line at 00:03:21 in the DVD version of the movie.
Quote context
[...]
- I said that everyone must wear a costume. Even me.
- Quiet!
- You've, er, forgotten your trousers, monsieur.
- These are trousers. Tyrolean trousers!
- And remember, Joseph... no one is to know that I am here. No one. Especially my wife.
[...]