俱舍論記 14.128

14.128

「又約持犯戒至名一分等」者，經部破前通經。又約持犯戒釋學一分等，彼受戒者尚不應問佛，況佛應為答。所以者何？誰有已解近事律儀必具五支，後持犯時而不能解於所學處持一非餘名一分等？先自解故，不應請問。

"Furthermore, in terms of maintaining and violating precepts ... is called one portion, etc." is the Sautrāntika refuting the previous resolution of the sūtra. Furthermore, if one explains training in one portion, etc., in terms of maintaining and violating precepts, that person receiving the precepts would not even have asked the Buddha, let alone the Buddha answering him. Why is that? Who, having already understood that the upāsaka discipline must possess the five branches, could fail to understand when later maintaining or violating them that maintaining one and not the rest among the training rules is called one portion, etc.? Having understood it oneself beforehand, one would not have asked.