瑜伽論記 22.72

22.72

In the third, distinguishing the bhikṣu according to the four divisions: the statement "being endowed with the genus-counterpart of the prātimokṣa discipline is its essential nature" nominally posits the genus-counterpart upon the prātimokṣa, the genus-counterpart being the essential nature of a bhikṣu, taking the Sarvāstivādin harmony as the essential nature of the saṅgha. The statement "regarding its bodily form and appearance" up to "is called a bhikṣu": this is the gloss on the words; shaving the hair and beard, wearing the kāṣāya, and so forth are why it says "its bodily form and appearance" and so forth. The statement "the differentiation of divisions refers to kṣatriyas and so forth, due to their differences" clarifies that among bhikṣus there are differences in renunciation from the four castes.