- Good old Scooby!
- I knew he wouldn't let us down.
3 seconds sound clip from Scooby-Doo, Where Are You! - Scooby Doo and a Mummy, Too (S1E12).
You can hear this line at 00:09:41.849 in the Blu-ray version of the episode.
Quote context
[...]
- Doo bee doo Bee doo bee doo doo bee doo Doo bee doo bee doo...
- How do you like that? He danced out and deserted us.
- Yeah, but you got to admit, he wasn't bad.
- I guess we'll have to give him the old coin, Shaggy.
- Yeah.
- I knew he wouldn't let us down.
- Now let's go find Daphne and Freddy and tell them we caught the mummy.
- Hey, Daphne, look! Footprints! And look how big they are!
- Come on. Let's follow. And stick close to me.
- The footprints disappear in this area where they're building the addition to the gym.
- Hey, look over there! Isn't that Dr. Najib's car?
- Yeah. I thought he left hours ago.
- Is he...
- He's turned to stone! Poor Dr. Najib! He must have met the mummy before he could leave.
[...]