According to the legend, the Ape Man lives in a secret cave somewhere in the rocks.
5 seconds sound clip from Scooby-Doo, Where Are You! - Never Ape an Ape Man (S1E7).
You can hear this line at 00:06:37.410 in the Blu-ray version of the episode.
Quote context
[...]
- Can't you wait a few days? I'll get this mystery cleared up.
- I'm afraid I'll have to withdraw my job offer. It's just too dangerous right now.
- Maybe we could give you a hand in solving this mystery.
- Yeah, who's afraid of a big, bad ape?
- I am!
- OK, gang, Daphne's uncle let us stay on the condition we be careful.
- According to the legend, the Ape Man lives in a secret cave somewhere in the rocks.
- It's strange how he was smart enough to get rid of that stuntman.
- There's something fishy about that.
- A dumb Ape Man is bad enough. One that smart I can live without. Get it? Live without?
- Me, too!
- Did you know that this set is built on the ruins of the original old mansion?
- Zooks! There should be some good clue-hunting around here.
[...]