成唯識論述記 5.260

5.260

述曰：念能憶昔曾所習事。曾於現在習者已滅，今起追憶；非我已滅今生追憶，境恒有故。五十五說：於串習事，念方生故。

The Commentary states: Mindfulness is able to recall matters previously practiced in the past. What was previously practiced in the present has already ceased, and now one gives rise to recollection; it is not that the self has already ceased and now recollection is generated, because its object is perpetual. Fascicle 55 states: 'Mindfulness arises only regarding familiar, practiced objects.'