俱舍論記 22.161

22.161

「論曰至無貪為性」者，釋無貪性。又《婆沙》四十云「問：不淨觀以何為自性？答：以無貪善根為自性。修定者說慧為自性，如契經說眼見色已隨觀不淨，觀是慧故。有餘師說：以厭為自性，厭所緣故。評曰：此不淨觀，無貪善根以為自性，非慧非厭。所以者何？對治貪故。若并眷屬，四蘊、五蘊為其自性。」

The words 'The treatise says ... has non-greed as its nature' explain having non-greed as its nature. Furthermore, the Mahāvibhāṣā, fascicle forty, says: 'Question: What is the intrinsic nature of the contemplation of impurity? Answer: It has the wholesome root of non-greed as its intrinsic nature. Meditators say that wisdom is its intrinsic nature, as the sūtra says: "Having seen forms with the eye, one subsequently contemplates impurity," and contemplation is wisdom. Other masters say: It has revulsion as its intrinsic nature, because it is disgusted with its object. Evaluation: This contemplation of impurity has the wholesome root of non-greed as its intrinsic nature, not wisdom and not revulsion. Why is that? Because it is the remedy for craving. If combined with its retinue, the four skandhas or five skandhas are its intrinsic nature.'