瑜伽師地論略纂 8.119

8.119

論云「若是處轉，若乃至轉，若如所轉，若時而轉」等者，此結上義。　若是處轉者，標上諸孔穴，即麁孔、細孔等也，即息於是所轉也。若乃至轉者，即牒說齊孔穴乃至齊處，即息入身乃至齊處轉也。　若如所轉者，牒上入出息以一為一等，其餘息時，如所順逆等轉也。若時而轉者，即牒上若時行者，以一為一等，乃至十十為一，時節長短相續等，名時而轉，即爾所時，數息應轉也。後成熟故不牒。

Where the treatise says, "whether the place where it moves, whether where it moves up to, whether as it moves, whether when it moves," and so forth: this concludes the meanings above. "Whether the place where it moves" designates the various apertures above, that is, the coarse apertures, fine apertures, and so forth—meaning that the breath moves in those places. "Whether where it moves up to" cites the aperture of the navel up to the region of the navel, meaning the breath enters the body and moves up to the region of the navel. "Whether as it moves" cites the aforementioned inhalation and exhalation, counting one as one and so forth; at other times of breathing, it moves in accordance with regular or reverse sequence. "Whether when it moves" cites the aforementioned time of the practitioner, counting one as one, up to ten tens as one, the length or shortness of duration, continuity, and so forth; this is called moving in time—meaning that during such an amount of time, the counting of breaths should proceed. Because it is later brought to maturity, it is not cited again.