瑜伽師地論分門記 6.53

6.53

第四長行廣解分十中第九明思惟諸色所攝法中幾是根性幾是所行性等義分六如下所明。

Within the fourth, the detailed explanation in prose, divided into ten, the ninth, clarifying the contemplation of how many among the phenomena subsumed under form are of the nature of faculties and how many are of the nature of spheres of activity, and so forth, is divided into six, as clarified below.