- It's a secret passage!
- You did it, Scooby! You found the way out!
- I did? Well, Scooby Dooby Doo!

10 seconds sound clip from Scooby-Doo, Where Are You! - What the Hex Going On (S1E6).

You can hear this line at 00:12:45.744 in the Blu-ray version of the episode.

Quote context

[...]

- It's a book about how to use a crystal ball.

- You mean the kind a fortune-teller uses?

- Right.

- Say, there's an old swami place in town. Maybe there's some kind of a connection.

- Zoinks! The door! Hey, we're locked in!

- Well, let's hope there's a secret way out of here. Start tapping on the walls.

- Hey, like, what happened to Scooby?

- He was right there a second ago.

- It's a secret passage!

- You did it, Scooby! You found the way out!

- I did? Well, Scooby Dooby Doo!

- That secret passage was a shortcut to the Wetherby Estate.

- I wonder if it has anything to do with Sharon's disappearance.

- I don't know, but maybe we'll find the answer here at the swami's place.

- It looks like the swami's out swami-ing somewhere else.

[...]