No, Daddy, no, you mustn't!
4 seconds sound clip from the Spaceballs movie soundboard.
You can hear this line at 00:56:25 in the Blu-ray version of the movie.
Quote context
[...]
- You're right, my dear. I'll miss your new nose.
- But I will not tell him the combination, no matter what.
- Very well. Dr. Schlotkin, do your worst.
[...]