俱舍論記 3.35

3.35

「出大便處至引令出故」者，此破大便處。出大便處於能棄捨便穢等事不應立根，重物在空性不停住，若內若外遍墮落故，非由其處。若固執者，亦由空墮應立空根。身中不淨，又由風力引令出故，非關其處。若固執者，亦由風引出應立風根。

Regarding "The excretory organ... because it is drawn and caused to emerge": this refutes the excretory organ. For the purpose of discharging excrement and defilement, the excretory organ should not be established as a faculty, because heavy objects in space by nature do not stay still, falling down universally whether internal or external, and not due to that place. If one obstinately clings [to this position], then because it also falls due to space, one ought to establish a space-faculty. Furthermore, the impurities within the body are drawn and made to emerge by the force of wind, which has nothing to do with that place. If one obstinately clings [to this position], then because it is drawn out by wind, one ought to establish a wind-faculty.