成唯識論述記 7.717

7.717

述曰：第三說：前二師俱非，此難前第一師也。且如自身、他身，自土、他土可互受用故，須杖他變。謂前第二卷說：若不變他，應無死後尸骸等事互相受用，即以他所變為己第八之質，由前理故，以《中邊》文變他為定。

The Commentary states: The third statement: both of the previous two masters are incorrect; this refutes the first master above. For example, one's own body and another's body, one's own land and another's land can be mutually utilized; hence it must rely on what others transform. As stated earlier in the second fascicle: if it did not transform others, there would be no mutual utilization of corpses and so forth after death; that is, taking what others transform as the archetype for one's own eighth consciousness. Due to the aforementioned reasoning, based on the text of the Madhyāntavibhāga, transforming others is definitive.