成唯識論述記 8.257

8.257

第五、「彼取」者，即彼上四取也。即一取言，通上四處，是單取及通彼上，是重取，謂有取，取前第一能、所取之取，如重緣心，取下三取亦然，故有八解。此八皆是二取所攝，即是現行之取也，或前四是境，彼取能取，但有四也。何以名習氣？

Fifth: "grasping them" means the aforementioned four graspings. That is, the single word "grasping" applies to the four cases above: it is a simple grasping, and as applying to those above, it is a reiterated grasping; that is, there is a grasping that grasps the first grasping of grasper and grasped, like a citta that reflexively observes [another citta], and grasping the lower three graspings is also like this. Hence there are eight interpretations. These eight are all subsumed under the two graspers, which are manifestations of grasping; or, the first four are cognitive objects, and "grasping them" is the grasping [subject], so there are only four. Why are they called vāsanās?