Draco dormiens nunquam titillandus

[Andrew]

No: HPFGUIDX 90423

Mandy said

So, perhaps the school is the sleeping dragon, or has a dragon under
it. In the Chamber of Secrets perhaps? There is excitement on
MuggleNet about the discovery of a new clue concerning the Chamber
of Secrets. And JKR herself said she almost gave it all away in book
2. What if the monster is not the Basilisk (he was just a pet), but
a Dragon? 

     Where is this quote? Could someone please direct me to it? 

     Andrew