Whoever it is, we know nothing.
5 seconds sound clip from the Gone with the Wind (1939) movie soundboard.
You can hear this line at 02:34:08 in the Blu-ray version of the movie.
Quote context
[...]
- India!
- I don't think we'd better say any more, or one of us will be saying too much.
- What's going on around here that I don't know about?
- Shh! Somebody's coming up the walk. Somebody that ain't Mr. Ashley.
- Will you hand me the pistol, please?
- Whoever it is, we know nothing.
- Now you've got to tell me. It's life or death.
- Don't tell him anything. He's a Yankee spy.
- Quickly. Please! There may still be time.
[...]