肇論新疏 3.55

3.55

通引三事，前二明無說，後一兼明無聽，反證前言之者失其真。摩竭，國名。《法華》說：「如來成佛三七日中而不說法。」《智論》第七云：「佛得道五十七日不說」等。義言掩室也。《淨名經》事可知。釋梵等者，《大品般若》自〈天主品〉以來，須菩提依幻化喻，廣說甚深般若無說無聽之理。至〈散花品〉，釋提桓因及三千大千世界中四天王等，化作天花散佛及大眾上等。意云：須菩提以說聽空故說而無說，以顯實相。諸天解空聽而無聽，為供深法故散花也。

This cites three events in all: the first two clarify no-preaching, and the latter one additionally clarifies no-listening, inversely corroborating the preceding 'those who speak of it lose its truth.' Magadha is the name of a country. The Saddharmapuṇḍarīka says: 'For three weeks after the Tathāgata attained Buddhahood, he did not preach the Dharma.' The seventh fascicle of the Mahāprajñāpāramitopadeśa says: 'For fifty-seven days after the Buddha attained the Way, he did not speak,' and so forth. In meaning, this is called 'shutting his door.' The matter in the Vimalakīrtinirdeśa is readily known. Regarding 'Śakra and Brahmā, and so on': in the Pañcaviṃśatisāhasrikā Prajñāpāramitā, from the 'Lord of the Devas Chapter' onward, Subhūti, relying on the metaphor of an illusion, extensively preaches the principle that profound prajñā has no preaching and no listening. Arriving at the 'Scattering Flowers Chapter', Śakra Devānām Indra and the Four Heavenly Kings in the trichiliocosm and so on magically produce divine flowers and scatter them over the Buddha and the great assembly. The meaning is: because preaching and listening are empty, Subhūti preached without preaching to reveal the dharmatā. The devas understood emptiness and listened without listening; to make an offering to the profound Dharma, they scattered flowers.