Sextus Empiricus Pyrrhoniae Hypotyposes 3.20.158

[158] That number is nothing apart from the numerables we shall demonstrate by basing our argument on the Monad, for the sake of lucidity of exposition. ¹ If the Monad, by partaking in which each of its participants becomes one, is in itself a real object, this Monad will be either one or as many as are its participants. But if it is one, does each of the things said to partake thereof partake of all of it or of a part of it? For if the one man (say) takes all the Monad, there will no longer exist a monad for the one horse to partake of, or the one dog or any one of all the other things which we declare to be one