Reference for Shevuot 33:9
אי אמרת בשלמא שיעורא גמירי משכחת לה דאניס נפשיה בקצרה ועבד עבודה
How can this be possible? If he did not tarry, how could he do the service?<span class="x" onmousemove="('comment',' Which priestly service, however minute, could he possibly do in less time than the period of prostration?');"><sup>15</sup></span> If he tarried, he is liable to kareth! Granted, if you would say that the tradition is that time [is the essential factor],<span class="x" onmousemove="('comment',' That the periods of duration mentioned in the Mishnah are simply measurements of time: the time duration of tarrying the period of prostration, and the time duration of going out by the longer route; and that he is exempt only if he does not tarry the period of prostration and goes out the shorter route, i.e., the time he spends in the Temple must be less than the combined times of the period of prostration and that occupied in walking out the shorter route at a medium pace.');"><sup>16</sup></span> then it is possible,<span class="x" onmousemove="('comment',' To have a case of an unclean priest officiating and tarrying the period of prostration, and yet not being liable for kareth, but for death by divine intervention.');"><sup>17</sup></span> if he strained himself in the shorter way, after he had done the service;<span class="x" onmousemove="('comment',' He ran out very quickly by the shorter route, so that, although he had tarried the period of prostration, the time he had spent altogether in the Temple was less than the combined times of prostration and walking out the shorter route at a medium pace.');"><sup>18</sup></span>