大方廣佛華嚴經隨疏演義鈔 6.38

6.38

Regarding the commentary's "Fifth, taking nirvāṇa as eternal..." onward, this refutes the fifth period. It concedes that its nirvāṇa has the meaning of eternal abiding, but rebukes it for claiming that nirvāṇa does not include the Hīnayāna, since all the way up to nirvāṇa there are both Mahāyāna and Hīnayāna. As for "the Āgamas explain the characteristics of the Tathāgata's nirvāṇa," they explain that the Tathāgata begged for food at Cunda's house, and due to eating a stew of sandalwood mushrooms, developed an affliction of back pain; between the twin śāla trees at the city of Kuśinagara, he entered and emerged in forward and reverse order traversing the samādhis, entered the fire-light samādhi in the fourth dhyāna, consumed his body, and passed into extinction, leaving only relics to serve as a field of merit for humans and devas. Body and cognition were both extinguished, which is the entering into nirvāṇa without remainder.