Full Idea
Even if you proclaim that a master and a slave shall have equal status, friendship between them is inherently impossible.
Gist of Idea
Friendship is impossible between master and slave, even if they are made equal
Source
Plato (The Laws [c.349 BCE], 757a)
Book Reference
Plato: 'The Laws', ed/tr. Saunders,Trevor J [Penguin 1970], p.229