That's the last of it. I'm through with slave running. Too risky. Fella named John Brown got himself hung for it.

8 seconds sound clip from the Dark Command (1940) movie soundboard.

You can hear this line at 00:33:12 in the Blu-ray version of the movie.

Quote context

[...]

- Pile in there. We're taking you across the border. You're free.

- Get off my land!

- We don't want slavery in Kansas.

- Where do we take this batch?

- Run 'em across the Missouri border. They should bring about 300 a piece.

- You're slowin' up. I expected more than this.

- That's the last of it. I'm through with slave running. Too risky. Fella named John Brown got himself hung for it.

- It's gunrunning for me from now on. It's healthier.

- What's the matter?

- Couple of men are complainin'.

- They'll get their money when we get over the ridge.

[...]