We'd better find him before he ends up like the Professor and Dr. Najib.
3 seconds sound clip from Scooby-Doo, Where Are You! - Scooby Doo and a Mummy, Too (S1E12).
You can hear this line at 00:12:23.643 in the Blu-ray version of the episode.
Quote context
[...]
- We got the mummy trapped inside.
- Uh-oh! Like, he's trapped inside, too.
- Scooby?
- Yeah. We forgot about the back window.
- Then that creep must have Scooby!
- We'd better find him before he ends up like the Professor and Dr. Najib.
- We found him, solid as a rock.
- Scooby! Like, wow! Too late! He's gone to that big boneyard in the sky.
- Ohh! Oh, my old pal! I'll never see his hungry face again! Ohh!
[...]