The tanks will leak some at first till the boards begin to swell and close the seams.

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

You can hear this line at 00:33:05.302 in the Blu-ray version of the movie.

Quote context

[...]

- How many tons can we handle a week? Depends on how hard we work.

- We'd better pitch our camp down the mountainside a bit.

- Why do that when the digging's up here?

- In case anybody happens by, we can tell them we're hunters and get away with it, maybe.

- Wouldn't it be easier to file a claim?

- Easier maybe, but not so profitable.

- Wouldn't be no time till a man from one of those big mining companies would be up here with a paper in his hand showing we had no right to be here.

- Well? How does it feel, you fellas, to be men of property?

- The tanks will leak some at first till the boards begin to swell and close the seams.

- Yeah, I sure had some cockeyed ideas about prospecting for gold. It was all in the finding, I thought. I thought all you had to do was find it, pick it up, put it in sacks, and carry them off to the nearest bank.

- You're learnin'. Pretty soon, I won't be able to tell you a thing.

- Tank full yet?

- Right to the top.

- Open the sluice gate.

- How much do you figure it to be now?

- Oh... About $5000 worth, I reckon.

[...]