大方廣佛華嚴經隨疏演義鈔 18.78

18.78

疏「舍支天鼓無心出故」者，即證第二無分別義。此有二喻：一舍支者，即〈十忍品〉如響忍云「如帝釋夫人阿修羅女，名曰舍支，於一音中出百千種音，亦不心念令如是出。菩薩摩訶薩亦復如是，入無分別界成就善巧隨類之音，於無邊世界中恒轉法輪。」天鼓，即〈出現〉語業第三，天鼓覺悟喻。結云「佛子！彼天鼓音，無主無作、無起無滅，而能利益無量眾生。」下法合竟結云「而如來音，不住方所、無有言說。」即無心出義。又如〈隨好品〉，天鼓為諸地獄天子說法云：「諸天子！如我說我，而不著我、不著我所。一切諸佛亦復如是，自說是佛，不著於我、不著我所。」即無心義故。諸論皆云：佛身如摩尼珠，無心現色；佛口如天鼓，無心出聲。皆無分別義。

On the Commentary's "Śacī and the celestial drum produce sound mindlessly": this corroborates the second meaning, non-discrimination. Here there are two similes: First, Śacī: in the "Ten Resignations" Chapter, on the resignation to resonance, it says: "Like the asura maiden Śacī, consort of Śakra Devendra, who emits hundreds of thousands of kinds of sounds from a single sound, yet has no mental thought to cause them to be produced in this way. The bodhisattva-mahāsattva is also just like this: entering the non-discriminative realm, accomplishing skillful sounds according to category, constantly turning the wheel of the Dharma in limitless worlds." Celestial drum: in the third on verbal karma in the "Manifestation" Chapter, the simile of the celestial drum awakening. Concluding, it says: "Disciples of the Buddha! That celestial drum's sound has no master and no creator, no arising and no cessation, yet it can benefit immeasurable sentient beings." Below, having finished applying it to the dharma, it concludes: "Yet the Tathāgata's voice does not abide in a locality and has no verbal expression." This is the meaning of producing mindlessly. Also, as in the "Subordinate Marks" Chapter, where the celestial drum preaches the Dharma for the devaputras of the hells: "O devaputras! Just as I say 'I' yet do not cling to an 'I' or to 'what belongs to an I', all Buddhas are also just like this: they declare themselves to be Buddhas, yet do not cling to an 'I' or to 'what belongs to an I'." This is precisely the meaning of mindlessness. The various treatises all say: "The Buddha's body is like a maṇi jewel, manifesting colors mindlessly; the Buddha's mouth is like a celestial drum, producing sounds mindlessly." These are all the meaning of non-discrimination.