大方廣佛華嚴經隨疏演義鈔 89.42

89.42

疏四十「室者字」，別譯云「室左」。文中先釋義、「謂積集即」下會經。諸處即是足跡者，佛所行跡故。《智論》云「若聞遮字，即知一切法不動相義，以遮邏此言動故。」釋曰：以《大品》云「遮字門，諸法行不可得。」行即動義，足即能行。即因行有跡，跡為所行。若依此義，法雷遍吼即行法也。

In the commentary on the fortieth [syllable], 'śca' (室者), another translation says 'śca' (室左). In the text, it first explains the meaning, and from 'meaning that accumulation is...' downward correlates it with the sūtra. The 'various places' are precisely the footprints, because they are the tracks walked by the Buddha. The Mahāprajñāpāramitopadeśa states: 'If one hears the syllable ca (遮), one immediately knows the meaning of the unmoving characteristic of all phenomena, because cala (遮邏) here means moving.' The explanation says: Because the Pañcaviṃśatisāhasrikā Prajñāpāramitā states: 'In the syllable-door ca, the activity of all phenomena is ungraspable.' Activity means motion, and the foot is what can move. Thus, due to activity there are footprints, and footprints are what is traversed. According to this meaning, the pervasive roaring of the Dharma thunder is indeed practicing the Dharma.