大般涅槃經集解 7.40

7.40

案道生曰：若佛涅槃無復教者，雖修梵行，終不能得離此毒身。

Daosheng states: If the Buddha enters nirvāṇa and there is no longer any instruction, then even if we cultivate the brahma-practice, we will ultimately never be able to leave this poisonous body.