成唯識論述記 8.298

8.298

述曰：即取我執及取名言以為境界而熏所成二種習氣，皆名為「取」，取此二故，名之為取，非此二種體自能熏可名取也。此即解頌上二句中三習氣也。

The Commentary states: Namely, taking ātmagrāha and taking nominals as objects, the two kinds of residual impressions formed by perfuming are both called "grasping." Because one grasps these two, they are named graspings; it is not that the substances of these two can themselves perfume and thus be called grasping. This explains the three residual impressions in the first two lines of the verse.