成唯識論演祕 6.663

6.663

此六識等但由煩惱間生，名雜；非以煩惱為因等起，方得雜名。又諸無記法等者，舉例證成，無記與惑相間名雜；非據因起，識等名雜，類亦應然。

These six consciousnesses and so forth are called "interspersed" merely because they arise alternated with defilements; it is not because they are co-arisen with defilements as their cause that they receive the designation "interspersed." Moreover, when it says "all neutral phenomena," etc., it adduces an example to prove this: neutral states are called "interspersed" because they alternate with defilements, not because they arise from them as cause; the consciousnesses and so forth should similarly be understood in this way.