成唯識論述記 7.276

7.276

述曰：此以喻成。如二定前善心引生種子名二定，二定名善，隨能引心，故此亦隨生得無記心滅故，彼果名無記。

The Commentary states: This establishes [the point] by means of an analogy. Just as the wholesome mind prior to the two attainments induces the seeds that are named the two attainments, and the two attainments are termed wholesome conforming to the inducing mind; so too, here, conforming to the cessation of the inborn indeterminate mind, that fruit is termed indeterminate.