俱舍論記 28.150

28.150

「如是所說至未離下故」者，釋後兩句。如上所說，淨、染生染，但約在定淨及染說。生彼地得，名生淨、生染。生淨謂生得善，生染謂彼地散惑。若生淨、生染能生染者，其理不然。謂命終時從生得善淨，一一無間生自、上、下一切地染。若從生染，一一無間能生自地、一切下地染，不生上者，未離下故。

"What has been stated as ... because one has not yet become detached from what is lower" explains the final two lines. As stated above, that pure and defiled produce defiled is explained solely with respect to the pure and defiled in concentration. What is attained by being born into that stage is called "birth-pure" (upapatti-śuddha) and "birth-defiled" (upapatti-kliṣṭa). "Birth-pure" refers to innate wholesome [states] (upapattilābhika-kuśala); "birth-defiled" refers to the distracted defilements (vikṣipta-kleśa) of that stage. If birth-pure and birth-defiled could produce defiled [concentrations], that principle would not hold. That is, at the time of death, immediately following the innately wholesome pure, each and every one can produce defiled [states] of all stages—own, higher, and lower. If from birth-defiled, immediately following each and every one, it can produce the defiled of its own stage and of all lower stages; that it does not produce higher ones is because one has not yet become detached from what is lower.