- I couldn't find out.
- That dumb bunch don't know.
- There's none of them there that knows.

7 seconds sound clip from the Ruggles of Red Gap (1935) movie soundboard.

You can hear this line at 01:00:26 in the Blu-ray version of the movie.

Quote context

[...]

- Hey. What did Lincoln say at Gettysburg?

- I don't know. I wasn't there.

- What did Lincoln say at Gettysburg?

- I don't know. What did he say?

- I was asking you.

- You wasn't there!

- I couldn't find out.

- That dumb bunch don't know.

- There's none of them there that knows.

- What a fine bunch of Americans!

- That's funny.

- Four score and seven years ago our fathers brought forth, on this continent, a new nation, conceived in liberty and dedicated to the proposition that all men are created equal.

- Why, that's it. Bill, don't tell me you know it.

- How does it go, Bill?

[...]