You're a sneak and a liar.
4 seconds sound clip from the The Westerner (1940) movie soundboard.
You can hear this line at 00:56:47 in the DVD version of the movie.
Quote context
[...]
- You won't have to patrol your fields any longer.
- Judge gave me his word they'd round up all cattle in this valley and take them out of here.
- You think he'd keep his word?
- Well, I'm going along with him to see that he does.
- Well, what makes you think we'd take your word?
- I got something to tell you before I go.
- Well?
[...]