瑜伽師地論分門記 6.158

6.158

分三十中第九明諸蘊世間義分二。一總問分二如論。二廣答分二。一答世間自性。二答其數。

Within the division into thirty: the ninth, explaining the meaning of the skandhas being mundane (laukika), 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 mundane; b. answering its enumeration.