成唯識論述記 8.398

8.398

述曰：識等五種彼名有者，親生當來識等五法之種子故，正因能生，故不說業。此皆偏說非謂實體。第十復云：全分有者，業及識乃至受所有種子，由取所攝，說為有故。此言有處，經論文多，故不別出。

The Commentary states: The five seeds of consciousness and the rest are named 'becoming' there because they are the seeds that directly generate the five future phenomena of consciousness and the rest; being direct causes able to produce [them], karma is not spoken of. These are both partial explanations and do not refer to the actual essence. The tenth fascicle further states: complete-factor becoming is the seeds of karma, and of consciousness through feeling, which are said to be 'becoming' because they are subsumed under grasping. As for this phrase 'in some places', the sūtras and treatises are numerous, so they are not cited individually.