俱舍論記 22.160

22.160

「此不淨觀至有漏通二得」者，此即第二諸門分別。無貪性，答初問。十地，答第二問。緣欲色，答第三問。人生，答第四問。不淨，答第五問。自世緣，答第六問。有漏，答第七問。通二得，答第八問。

The words 'This contemplation of impurity ... is sāsrava, and acquired in two ways' are the second [part], the distinctions according to various categories. Having non-greed as its nature answers the first question. Ten stages answers the second question. Taking desire-realm form as object answers the third question. Arising in humans answers the fourth question. Impure answers the fifth question. Object of its own period answers the sixth question. Sāsrava answers the seventh question. Acquired in two ways answers the eighth question.