No, I know the whole landscape around here. If there had been a single grain of gold, you can bet I'd have sure seen it. There's nothing doing here for gold.

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

You can hear this line at 00:53:18.075 in the Blu-ray version of the movie.

Quote context

[...]

- What's your game?

- I'm a hunter.

- Professional?

- Yeah.

- What all do you hunt?

- Oh, tiger cats... Anything of commercial value.

- How long did you say you've been in these mountains?

- Oh, a few months.

- Ever seen anything that looked like paydirt?

- Nah.

- I've a hunch there's loads of the real goods up in those mountains.

- No, I know the whole landscape around here. If there had been a single grain of gold, you can bet I'd have sure seen it. There's nothing doing here for gold.

- Listen, brother, I can look at a hill 5 miles away and tell you whether it carries an ounce or a shipload.

- ¿Cuanto?

- 22 pesos.

- If you haven't found anything up there yet, I'll come along with you and put your nose in it.

- There's indications in this valley, lots of indications.

[...]