成唯識論演祕 1.206

1.206

有無餘依名之為二，樂住二中云非不住。致此言者，明無住處名真解脫。彼既樂住，故非真解脫。

[Nirvāṇa] with residue and without residue are termed "these two"; taking pleasure in abiding in these two is called "not non-abiding." Uttering these words is to clarify that the non-abiding realm is called true liberation. Since they take pleasure in abiding, it is not true liberation.