פירוש על שבת 162:11

WHAT IS THE HALAKHA WITH REGARD TO TAKING THOSE STONES UP WITH HIM TO THE ROOF — if he went up there to defecate. [The question is] whether we are concerned for excess effort or not.

AS IT OVERRIDES A PROHIBITION IN THE TORAH — As it is written (Deut. 22:1) "ignore it," which excludes an elderly person where (returning the lost object) is not in keeping with his dignity [see Bava Metzia 30a]. Here, too, moving [the stones] is a rabbinic prohibition that the Sages created on the authority of [the verse] "you must not deviate" (Deut. 17:11); and [this prohibition] is pushed aside where it is in conflict with human dignity