成唯識論演祕 2.116

2.116

如一色上有苦、無常及愛、非愛乃至微圓一切等相，故名為多。五識唯緣色等自相，言一分也。

For instance, upon a single material form there are aspects of suffering, impermanence, desirable, undesirable, down to atomicity, roundness, and all such aspects; hence they are called "many." The five consciousnesses cognize only the intrinsic nature (svalakṣaṇa) of form and the like, which is meant by "one part."