俱舍論記 22.153

22.153

「此中先應至名超作意位」者，此下第二別釋。就中，一明不淨觀、二明息念觀。就明不淨觀中，一明不淨相、二諸門分別。此即第一明不淨相。

The words 'Herein, one should first ... is called the stage of transcending mental application' begin the second [section] below, the distinct explanation. Within this, there are first, explaining the contemplation of impurity, and second, explaining the contemplation of mindfulness of breathing. In explaining the contemplation of impurity, there are first, explaining the characteristics of impurity, and second, distinctions according to various categories. This is the first, explaining the characteristics of impurity.