成唯識論了義燈 5.268

5.268

《論》：或此俱是觸處少分。問：無色界中既云無色，死、生如何是悶絕攝？答：即依前解，四蘊分位假立，悶絕亦無有失，此皆共成。

The treatise: "Or these are both a subtle portion of the base of tactile objects (spraṣṭavyāyatana)." Question: In the formless realm, since it is said to have no form, how can death and birth be subsumed under fainting? Answer: Exactly relying on the previous explanation, it is nominally designated according to the status of the four aggregates; there is also no fault in [it being] fainting. These are all established in common.