But the good lord gave me a nose for smellin' a horse thief a mile off.

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

You can hear this line at 00:27:25 in the Blu-ray version of the movie.

Quote context

[...]

- Come on, doc, your job is pulling teeth out of people's mouths, not putting words in 'em. Let him speak for himself. Come on, let him talk for himself.

(People cheering)

- The judge here is right about that speech. Doc wrote one out for me, all right, but he forgot I couldn't read.

(Crowd laughing)

- Folks, it's true. I don't know much about the law. Ain't had much book-learnin'.

- But the good lord gave me a nose for smellin' a horse thief a mile off.

- And what you need in these parts, is a marshal that's better at smellin' than spellin'.

(Audience laughing)

- Mr. Cantrell here says that I'm honest, that I ain't afraid of nothin'.

- He didn't say I was too dumb for this job, but that's what he meant.

[...]