大般涅槃經集解 2.77

2.77

案僧亮曰：諸羅漢知佛是常，今欲請佛發明常教也。此經第一義空者，常樂我淨。無二十五有，故名空也。僧宗曰：般若是萬行之主，欲令眾生得無相之解也。

Sengliang comments: The arhats knew that the Buddha is permanent, and now wished to entreat the Buddha to reveal and illuminate the teaching of permanence. The foremost emptiness in this sūtra is permanence, bliss, self, and purity. It lacks the twenty-five states of existence, and hence is called 'empty'. Sengzong says: Prajñā is the master of the ten thousand practices; they wished to cause sentient beings to attain the understanding of signlessness.