Menachot 34 - Shabbat February 14, 27 Shvat

Rav Huna states that a closed-in staircase opening (lul) between a house and an upper story requires one mezuza if it has one entrance and two mezuzot if it has two. Rav Papa infers from this that a room (indrona) with four doors requires four mezuzot, even if the resident typically utilizes only one of them. Amemar rules that a doorway situated at a corner is obligated in a mezuza; though Rav Ashi questions this due to the lack of formal doorposts (patzim), Amemar maintains that the edges of the walls themselves serve as the post.

Rav Papa observes a doorway in Mar Shmuel's house that had only a left-side post yet was fitted with a mezuza. He questions this practice, as it seems to follow Rabbi Meir, who obligates a mezuza for a house with only one post—but even Rabbi Meir only holds that a mezuza is placed on the right side. The source for the right-side placement is derived from the word "beitecha" (your house), which is interpreted as "biatcha" (your entry). The connection between entry and the right side is either because a person begins their entry by leading with the right foot, or it is derived from the verse regarding Jehoiada the kohen, who placed a chest for donations to the right of the altar as people “came in.” The dispute between Rabbi Meir and the Rabbis regarding a single doorpost centers on the plural phrasing of "mezuzot." The Rabbis hold this implies a minimum of two posts, while Rabbi Meir explains how the term can signify a single post, based on the interpretations of Rabbi Yishmael and Rabbi Akiva who utilize various exegetical principles.

A braita derives the obligation to write the mezuza on parchment and then affix it to the wall, rather than writing it directly on the stones of the doorpost as might be understood from a simple reading of the verse.

Regarding tefillin, the four paragraphs are all essential (me’akvot); even the omission of a single letter, or the "tip" of the letter yud, renders them invalid. Rav Yehuda in the name of Rav adds that every letter must be surrounded by blank parchment on all four sides. The Gemara discusses the source for the four compartments of the head tefillin (shel rosh). Rabbi Yishmael derives the number four from the number of mentions and spelling variations of the word "totafot," while Rabbi Akiva explains that the word is a compound of "tat" (two in the Katpi language) and "pat" (two in the Afriki language).

A braita clarifies that while the tefillin shel rosh contain four separate scrolls in four compartments, the arm tefillin (shel yad) consist of all four paragraphs written on a single scroll. If one wrote the tefillin shel rosh on one scroll, it is valid, as long as it is put into four separate compartments. If one wrote the tefillin shel yad on four separate scrolls and placed them in one compartment, it is valid, though Rabbi Yehuda requires them to be glued together to appear as one. Rabbi Yosi rules that a tefillin shel rosh can be used on the arm if it is covering by one piece of leather. A contradiction is raised against Rabbi Yosi as Rabbi Yochanan ruled that this is not possible as one cannot lower an item in sanctity, i.e. from the head to the arm.

The order of the paragraphs to be placed in the four compartments of the tefillin shel rosh is established as: kadesh and v’haya ki yeviacha on the right, followed by shema and v’haya im shamoa on the left. To resolve a contradiction with another source that reverses this, Abaye clarifies that each source refers to a different perspective of “right” and “left,” depending on whether one is looking from the perspective of the reader or the wearer. Rashi and Rabbeinu Tam (among others) disagree about how to understand the specific order of the tefillin described in the Gemara. Rav concludes that if a scribe switches the order of the paragraphs, the tefillin are invalid.