You're wrong, brother. This means all our funerals.

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

You can hear this line at 01:04:16.374 in the Blu-ray version of the movie.

Quote context

[...]

- Ok. Let's make it short and sweet for him.

- So it's number one, is it?

- Better take a look down that hill first.

- Can't make out what they are. Must be soldiers.

- Oh, so that's your stinking game, is it? Informing. I knew you was an informer. I knew it all the time.

- You're wrong, brother. This means all our funerals.

- What's that?

- If that's what I think it is, may the lord be with us.

- They're not soldiers. They're bandits, and they're not after gold, but after guns and ammunition.

- Someone at the village must've told them about the American hunter up here.

- They don't look like soldiers to me, either.

[...]