成唯識論述記 8.605

8.605

述曰：此釋第三名，此變易生死，亦名變化身，無漏定力轉令異於本分段身，清淨微妙廣大光潔如變化故，從喻為名，然初二名義用彰名，此即從喻。如有論說，引教成名，此《顯揚論》第十六說，聲聞無學等乃至非業報身，皆彼論文之問答也，亦不違理，故知從喻即變易生也。此即第二、釋名兼辨得人訖。

The Commentary states: This explains the third designation. This transmigration of transformation is also called the "body of transformation" (nirmāṇakāya), because the power of undefiled concentration transforms it, making it different from the original body of delimited allotment; it is pure, subtle, vast, radiant, and clean, like a transformation. Thus it is named from a metaphor. The first two designations make their names manifest from their sense and function, whereas this one is taken from a metaphor. As stated in a treatise, citing scripture to establish the name: this is spoken in the sixteenth fascicle of the Prakaraṇāryavācā, where from "an arhat of the śrāvakas, up to... it is not a body of karmic fruition" are all questions and answers in that text; it also does not contradict principle. Hence we know that "taken from a metaphor" refers precisely to transformative rebirth. This concludes the second [section], explaining the names and also discerning the persons who obtain it.