楞伽阿跋多羅寶經註解 1.634

1.634

此言大乘菩薩以本願方便，欲令一切眾生悉入涅槃而後涅槃。言不般涅槃法相者，菩薩了生死即是涅槃，涅槃本具，非別有涅槃可入，所謂清淨行者，不入涅槃者是也。言亦到一闡提趣者，蓋菩薩了惡即善，無善可修，趣同闡提，捨一切善及不入涅槃故也。

This states that the Mahāyāna bodhisattva, through original vows and skillful means, wishes to cause all sentient beings to enter nirvāṇa before entering nirvāṇa themselves. As for "the characteristic of the dharma of non-parinirvāṇa," the bodhisattva realizes that birth and death are themselves nirvāṇa, and nirvāṇa is inherently possessed, so there is no separate nirvāṇa to be entered; this is what is meant by "a pure practitioner does not enter nirvāṇa." As for "this also reaches the destiny of the icchantika," because the bodhisattva realizes that evil is itself good, and there is no good to cultivate, their destiny is similar to the icchantika who abandons all good and does not enter nirvāṇa.