This ain't no Salvation Army. This is everybody for himself. Dog eat dog.
3 seconds sound clip from the Stalag 17 movie soundboard.
You can hear this line at 00:25:42.684 in the Blu-ray version of the movie.
Quote context
[...]
- Now, ain't that too bad? Tomorrow he'll have to suck a raw egg.
- I'd like to have some of that loot you got in those foot lockers.
- This ain't no Salvation Army. This is everybody for himself. Dog eat dog.
- Now you've done it. You've given me nervous indigestion.
- Anything else bothering you, boys?
- Yeah, just one little thing.
[...]