摩訶止觀 7.93

7.93

其中唯有屎尿之聚、膿聚血聚、膏髓等聚、大腸小腸、肪𦙽腦膜、筋纏血塗、惡露臭處、蟲戶所集，盡海水洗不能令淨。論云：「此身不如摩羅延山能出旃檀，自小至大，性是不淨。」譬如糞穢，多少俱臭。是名「自性不淨」。

Within it there are only accumulations of feces and urine, accumulations of pus and blood, accumulations of fat, marrow, and the like, large intestines and small intestines, fat, blubber, brain, membranes, sinews binding and blood smearing, foul secretions and reeking places, where swarms of worms gather. Even if one were to wash it with all the water of the ocean, one could not make it clean. The treatise says: 'This body is not like Mount Malaya, which can produce sandalwood; from youth to old age, its nature is impure.' Just as with excrement, whether much or little, all of it stinks. This is called 'impurity of intrinsic nature.'