- Then there must still be gold in that old mine.
- Not gold. Black gold.
- You mean oil?
- Like, right.

8 seconds sound clip from Scooby-Doo, Where Are You! - Mine Your Own Business (S1E4).

You can hear this line at 00:19:57.013 in the Blu-ray version of the episode.

Quote context

[...]

- Huh? Look! Stilts!

- Shaggy's right. He is wearing stilts.

- Then this can only be one person. Hank.

- Hank?

- Aw, dagnabit!

- So it was old Hank who was scaring off my guests.

- To force you out of business.

- That way he could buy the guest ranch, the ghost town...

- And, like, the mine for almost nothing.

- Then there must still be gold in that old mine.

- Not gold. Black gold.

- You mean oil?

- Like, right.

- But how did Hank know about the oil?

- He accidentally found the secret mine entrance in the old hotel safe.

- And instead of gold, he found oil.

- He had the exact location laid out on a map.

- Then he, like, hid the map in the cigar store Indian for safekeeping.

[...]