You'll be buried in Potter's Field and you'll have accomplished nothing.
6 seconds sound clip from the Meet John Doe (1941) movie soundboard.
You can hear this line at 01:57:54 in the DVD version of the movie.
Quote context
[...]
- I guess you're right. I'm afraid the joke's on us.
- Let's go. I hope nobody finds out we've been here.
- I wouldn't do that if I were you, John...
- You'll be buried in Potter's Field and you'll have accomplished nothing.
- I've already mailed a copy of this letter to Mr. Connell.
- John, why don't you forget this foolishness?
- Stop right were you are, Mr. Norton, if you don't want to go aboard with me.
- I'm glad you gentlemen are here.
[...]