What's the use of railing against the old man? It won't do any good.

3 seconds sound clip from the The Treasure of the Sierra Madre movie soundboard.

You can hear this line at 01:29:49.289 in the Blu-ray version of the movie.

Quote context

[...]

- Ha ha ha! See you in Durango.

- Ain't it always his burros that won't march in line, stray off the trail, and smash their packs against the trees and the rocks? I wish they'd stray off far enough to fall down about 2000 foot of gorge.

- What was in your head when you offered to carry his goods for him if he couldn't manage by himself?

- He knew what he was doing when he turned them over to us.

- Mighty cute of him, wasn't it?

- What's the use of railing against the old man? It won't do any good.

- Save your breath for that next piece of trail.

- I'm stopping here for the night. If you want to go on, it's ok with me, but take his burros with you. Ain't my responsibility.

- It's early yet. We'll make 4 or 5 miles more before dark.

- Well, nobody ordered you to stay here. You can go 20 miles more for all I care.

[...]