楞伽阿跋多羅寶經註解 4.214

4.214

剎那者，時之最促，念之極微者也。如云「壯士一彈指頃，六十一剎那。」故以心念起滅不停為剎那。又物之無常變壞者為剎那，是皆眾生虛妄識相。上說妄想身轉，是說陰等無常，故舉諸法剎那壞相為問。答中先列一切法名，然後為釋。

A kṣaṇa is the briefest unit of time, the infinitesimal limit of a thought. As it is said: 'In the time of a strong man's finger-snap, there are sixty-one kṣaṇas.' Hence, the unceasing arising and cessation of mental thoughts is called a kṣaṇa. Moreover, the impermanence and changing destruction of things is a kṣaṇa; these are all the deceptive consciousness-marks of sentient beings. Above, it was said that 'the vikalpa-body transforms', which spoke of the impermanence of the skandhas and so forth; thus the momentary destructibility of all dharmas was raised as an inquiry. In the answer, the names of all dharmas are first listed, and then explained.