大毘盧遮那成佛經疏 2.8

2.8

經云「若壽」者，謂有外道計一切法乃至四大草木等皆有壽命也。如草木伐已續生，當知有命。又彼夜則卷合，當知亦有情識，以睡眠故。難者云：若見斬茢還生，以為有命；則人斷一支不復增長，豈無命耶？如合昏木有睡眠，則水流晝夜不息，豈是常覺？皆由不觀我之自性，故生種種妄見也。

The sūtra says: “Or life.” This refers to non-Buddhists who impute that all dharmas, up to the four great elements, grasses, and trees, all possess life (jīva). For instance, when grasses and trees grow again after being cut down, one should know they possess life. Furthermore, at night they fold up, so one should know they also possess sentience, because they sleep. The refuter says: If seeing that they grow again after being chopped down you consider them to possess life, then when a person has a limb severed it does not grow again—could they be without life? If the mimosa tree has sleep, then water flows day and night without rest—could it be perpetually awake? All this arises because of not contemplating the intrinsic nature of the self, thereby giving rise to various false views.