瑜伽師地論分門記 6.42

6.42

第四長行廣解分十中第六明思惟色蘊所攝地等四界作業差別等相分三如下所明。

Within the fourth, the detailed explanation in prose, divided into ten, the sixth, clarifying the contemplation of the distinctions of activities and other characteristics of the four elements—earth and so forth—subsumed under the form aggregate, is divided into three, as clarified below.