法界次第初門 2.31

2.31

四、食不淨想。觀諸飲食不淨智慧相應想，名食不淨想。世間飲食皆從不淨因緣故有，如肉從精血、水道中生酥酪等，皆亦隨事觀之，悉是不淨也。

4. The notion of the foulness of food: The notion associated with the wisdom that contemplates all food and drink as impure is called the notion of the foulness of food. Food and drink in the world all exist due to impure causes and conditions, just as meat arises from semen and blood, and butter, cheese, and the like from water channels; contemplating each according to the facts, they are all impure.