瑜伽論記 15.478

15.478

眾苦生因者：謂受緣愛，愛緣取，取緣有等，出生因體，即先所作下釋。

Regarding 'the productive causes of all sufferings: conditioned by feeling is craving, conditioned by craving is grasping, conditioned by grasping is existence, etc.', this identifies the entity of the productive cause, which is explained below as 'what was previously performed'.