成唯識論述記 9.497

9.497

述曰：印前所取無，順後能取無，名印順定。順通二種，一名樂順；二名印順。若此三品皆名為忍，下、上位中皆印忍故，立「印順」名。一、印順名通初及後，樂、順之言唯在中忍，故合但言印順定也。又差別者，下品忍名印忍，印所取無故；中品忍名樂順，樂無能取，順修彼故；上忍起時但名印順，印能取無，順觀彼故，故合三忍名印順定。忍者智也，印順俱定名印順定，初後准此解。於無所取決定印持者，是下忍位，無能取中亦順樂忍者，是中、上忍位，順通中、上，樂唯在中。

The Commentary states: Ascertaining the non-existence of the preceding grasped object and complying with the non-existence of the subsequent grasping subject is called the samādhi of ascertainment and compliance. Compliance encompasses two kinds: one is called delighting compliance, and the second is called ascertainment compliance. If these three grades are all named patience, because both the lower and higher grades ascertain with patience, the name 'ascertainment and compliance' is established. First, the name 'ascertainment and compliance' applies to the initial and subsequent, while the words 'delight' and 'compliance' apply solely to medium patience; therefore, taking them together, it is merely called the samādhi of ascertainment and compliance. Furthermore, regarding their distinction: lower patience is called ascertainment patience, because it ascertains the non-existence of the grasped object; medium patience is called delighting compliance, because it delights in the absence of the grasping subject and complies with cultivating that; when higher patience arises, it is merely called ascertainment compliance, because it ascertains the non-existence of the grasping subject and complies with contemplating that. Therefore, combining the three patiences, it is called the samādhi of ascertainment and compliance. Patience is wisdom; samādhi conjoined with ascertainment and compliance is called the samādhi of ascertainment and compliance. The beginning and end should be understood in accordance with this explanation. Decisively ascertaining and holding to the absence of the grasped object is the stage of lower patience; complying with, delighting in, and being patient with the absence of the grasping subject is the stage of medium and higher patience: compliance applies to both medium and higher, while delight applies solely to medium.