瑜伽師地論分門記 6.159

6.159

分三十中第十明諸蘊墮界義分二。一總問分二如論。二廣答分二。一答墮界自性。二答其數。

Within the division into thirty: the tenth, explaining the meaning of the skandhas being included in the realms (dhātu-patita), has two parts: (1) A general question has two parts as in the treatise. (2) An extensive answer has two parts: a. answering the intrinsic nature of being included in the realms; b. answering its enumeration.