can someone please help me find this quote?

[Geoff Bannister]

No: HPFGUIDX 181246

--- In HPforGrownups at yahoogroups.com, "Ivy" <desiivy at ...> wrote:
>
> I don't remember which book all I remember is that Harry, Ron and
> Hermione were looking at something and she got frustrated with them
> and asked them something like don't you guys ever read a book. I
> think  Ron or Harry replied with something like that's why we got you.
> 
> I would really appreciate any help.
> 
> 
>   Thanks Ivy

Geoff:
One occasion that comes to mind but doesn't quite fulfil 
all your criteria is:

'At last she found what she was looking for.
"I knew it! I knew it!"
"Are we allowed to speak yet?" said Ron grumpily. 
Hermione ignored him.
"Nicholas Flamel," she whispered dramatically, "is the 
only known maker of the Philosopher's Stone!"
This didn't have quite the effect she'd exected. 
"The what?" said Harry and Ron.
"Oh, honestly, don't you two read? Look - read that, there."'
(PS "Nicholas Flamel" p.161 UK edition)

Is that what you are seeking?