I believe it. I believe it.
3 seconds sound clip from the Stalag 17 movie soundboard.
You can hear this line at 01:19:00.687 in the Blu-ray version of the movie.
Quote context
[...]
- Simply this. After the hostilities are ended, there will be such a thing as a war crimes commission.
- Very well. If you insist on details, I have ways of finding out about that blasted time bomb.
- Good day, sir. You will forgive me for receiving you like this.
- Perfectly all right. I do not like boots.
- Schulz!
- Let's have your dog tags for the Christmas tree.
- What's the idea? You don't think you can eat that stuff.
- We're building us a smudge pot so Patton can find us when he comes.
- Twenty parts of cellulose, one part phosphorous. Watch.
[...]