Howdy, Henry.
3 seconds sound clip from the The Big Trail (1930) movie soundboard.
You can hear this line at 01:15:29 in the Blu-ray version of the movie.
Quote context
[...]
- You're a-going to prove how good you are, before you leave the fort.
- You do your job before you leave the fort.
- Black Elk and the Cheyennes are going west to hold a powwow with the Shoshones.
[...]