大般涅槃經集解 3.12

3.12

案僧亮曰：今說涅槃無一切有，故名為空。希有常樂萬德，如虛空中有堂閣也。

Sengliang states: "Now nirvāṇa is spoken of as devoid of all existence; hence it is called empty. The rare permanence, bliss, and myriad virtues are like the hall and pavilions in the sky."