"so that the Torah of the L–rd be in your mouth": What is the intent of this? From "And it shall be to you as a sign," I would assume that women, too, are included (in the mitzvah of tefillin (leather phylacteries worn during prayer)). And this would follow, viz.: Since both mezuzah (a parchment scroll affixed to doorposts) and tefillin are positive commandments, then if we have learned that (the mitzvah of) mezuzah obtains with women as well as with men, the same is true of (the mitzvah of) tefillin. It is, therefore, written (in respect to tefillin) "so that the mitzvah of tefillin be in your mouth." (the mitzvah of tefillin obtains) only with one who is commanded to study Torah. From here they derived: All are commanded to put on tefillin except women and bondsmen.