Full Idea
Each of the three mental categories (reason, spirit, appetite) has its own particular pleasure, so that there are three kinds of pleasure.
Gist of Idea
There are three types of pleasure, for reason, for spirit and for appetite
Source
Plato (The Republic [c.371 BCE], 580d)
Book Reference
Plato: 'Republic', ed/tr. Waterfield,Robin [OUP 1993], p.326
A Reaction
I'm not sure why the types of pleasure are distinguished by mental faculties, rather than by the variety of sources of the pleasure.