The Rambam, or Maimonides, was a famous 12th century Rabbi, philosopher, and physician. He wrote the Mishneh Torah and the Moreh Nevuchim (Guide to the Perplexed).

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Maimonides' sources for the Thirteen Articles of Faith

Which, if any, of the Thirteen Articles of Faith require sources outside the five Torah books? 1 G-d guides and creates, 2 is unique and eternal, 3 is not physical, 4 is first and last, 5 ...
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Does a trapezoid require tzizit? (Or: how to make a four-cornered triangle)

My family was learning Rambam Hilchot Tzitzit 1:16 tonight and had some questions on how this works, as a practical matter: וכן המטיל לבעלת שלש ואחר כך השלימה לארבע והטיל לרביעית כולה פסולה שנאמר ...
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Rambam Epistle to Yemen identification

In Rambam's Epistle, he mentions three groups that challenged the Jewish people by coming up with a new religion. He mentions Jesus first and Islam (who he refers to as the Madman) last. However, he ...
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This is on the RamBam isurei biah Chapter 15 - Halacha 25…Asufi of possible Gentile lineage?

It is stated in Rambam Isurei Biah - Chapter 15 - Halacha 25: When an asufi is found in a city inhabited by gentiles, whether the majority are gentiles or the majority are Jews, the child is ...
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How does the Rambam understand the end of Shir Hashirim?

The Rambam in Hilchos Yesodei HaTorah, 6:9, states: Every mention of the name "Shelomoh" in the Song of Songs is sacred, except [8:12]: "You, Shelomoh, may have the thousand." (trans. by ...
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Rambam, Maaseh Merchava and Maaseh Bereishis

The Rambam writes in Hilchos Yisodei HaTorah at the end of Chapter 2: ב,טז [יא] דברים אלו שאמרנו בעניין זה בשני פרקים אלו, כמו טיפה מן הים הן ממה שצריך לבאר בעניין זה. וביאור כל העיקרים שבשני ...
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Do primary sources unequivocally record coming of the Moshiach and establishing world order

Do the primary sources like Torah , tanach record the elaborate and supernatural propheises concerning the Moshiach? Rambam and talmud has described the qualities of Moshiach but do the primary ...
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Was the Rambam successful?

The Rambam is said to have written the Mishneh Torah to replace the study of the Talmud (although what he really said was that he intended it to be a compendium of all the rulings of the Talmud so ...
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Does the Rambam's definition of cofer Torah no longer hold? [duplicate]

In hilchot teshuvah, perek 3, halacha 8, the Rambam writes that someone "who denies the Torah" is "one who says the Torah, or one verse, or one word is not from God". Taking into consideration the ...
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PreRishonic sources against the tekhelet half-string

What are the classical (pre-rishonic) sources explicitly or implicitly against the view of the Rambam that the tekheleth string is only half-dyed?
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The pre-Maimonidean half-tekheleth string

Are there any sources prior to the Rambam that suggest (even implicitly) that the tekheleth string is only half-dyed?
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Why doesn't the Rambam mention the Brochah on Tevillas Keilim?

Why doesn't the Rambam mention the Brochah on Tevillas Keilim? Even if he holds its a Mitzve Drabanon (as this is subject to an argument), but by others he specifies the Brochah. So why is it ...
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Rambam's Talmud Commentary

Where can I find Rambam's commentary on Bavli (whatever remains of it) besides for his commentary on tractate Rosh HaShana?
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Is there a Moreh Nevuchim dictionary?

I'm wondering if there exists a dictionary for the more technical terms used in the Moreh Nevuchim? (Any of the translations). I know I could just use an English translation and match up the words, ...
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Why is “בבהילו יצאנו ממצרים” a mix of two paraphrases?

Included in the Rambam's hagada text is the line בבהילו יצאנו ממצרים‎, replicated in some modern hagados. This line blends near-quotations of D'varim 16:3, כִּי בְחִפָּזוֹן יָצָאתָ ...
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Difference between the RamBam and Talmud Kiddushin 82a in list of jobs that posul a King/High Priest?

Anyone have any insight as to why there is a difference between the two, or why the RamBam seems to omit several of the jobs (i.e. cleaner, peddler, etc.)? Thanks
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Which witness testifies about a blasphemer?

In Rambam Hilchos Avodas Kochavim Perek 2 halacha 8 it says that if someone curses the name of God, the court examines the witnesses as to what they heard. The "great one" (Rambam's words) of all the ...
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How many halachot are detailed in the Mishneh Torah?

How many halachot are detailed in the mishneh Torah? For counting purposes I am only interested in the counting of the author's. Meaning if the mishna torah puts two rules together under one halacha ...
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Bet HaMikdash and Olam Haba - Rambam

If, as the Rambam says, Olam Haba is something that comes after the days of Mashiach and the ressurrection of the dead, and if it is a completely spiritual reality - as I read in his Treatise on ...
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Rambam in Mitzvah of Ner Channukah: why “Shemen and Neros”?

The Rambam writes in Hilchos Channukah Perek 4 Halacha 12: אפילו אין לו מה יאכל אלא מן הצדקה שואל או מוכר כסותו ולוקח שמן ונרות ומדליק What is the reason the Rambam wrote to take "Shemen and ...
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Shem Yosef on Mishne Torah?

Who authored the Shem Yosef commentary on Rambam's Mishneh Torah? This work is featured on the online bar-ilan database.
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The Rambam on health

Does the Rambam talk about health in his Sefer , Mishnah Torah ? I'm thinking maybe he talks about it in Hilchos דעות.
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Writings of R. Ovadiah Maimuni

Are any of the writings of R. Ovadiah Maimuni, Rambam's grandson such as The Treatise of the Pool available for free online?
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Rambam and Eliyahu Hanavi and Mosiach

Why in the Rambam when he speaks of what will happen when Mosiach comes there is no mention of Eliyahu Hanavi when in the gemara [Eiruvin 43b] it says that Eliyahu will come first like it says in the ...
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Weapon used to punish sleeping mikdash guards

The very start of mishnayos maseches Midos mentions that the l'viyim guarded the bes hamikdash in various locations, and that, if the captain of the guards caught a guard asleep on the job, he'd hit ...
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Are the calculations of the Molad mentioned by Ramba"m based on constant or variable (seasonal) figures?

Rambam KidushHachodesh 6:3 states: [the interval] between one conjunction of the moon and the sun and the subsequent conjunction according to their mean movement is twenty-nine full days, ...
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Trying to understand what Rambam says about duchaning in a minyan of kohanim

Mishneh Torah Hilchot Tefilla 15:10 (:9 according to some): נְשִׂיאַת כַּפַּיִם בַּעֲשָׂרָה, וְכוֹהֲנִים מִן הַמִּנְיָן. בֵּית הַכְּנֶסֶת שֶׁכֻּלּוֹ כּוֹהֲנִים, כֻּלָּן נוֹשְׂאִין אֶת כַּפֵּיהֶן; ...
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Source for Mishne Torah's Song of the Levites for Shabbat afternoons

Mishne Torah in Hilchos Temidin uMusafin 6:9 brings the following halacha: במוספי שבת, אומרין שירת "האזינו" (דברים לב,א), וחולקין אותה לשישה פרקים ה'ז'י'ו' ל'ך', כדרך שקוראין אותה שישה בבית הכנסת; ...
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What's the difference between יאכלו נקודים and יתחלקו לעסות (in תרומות פ״ה)?

A few משניות in chapter 5 of מסכת תרומות discuss טמא wheat kernels that got mixed with טהור ones that never became מוכשרים לקבל טומאה. They say that, to avoid making the טהור ones טמא, we do one of ...
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Destruction of Angel Worship Sites

PREFACE: THIS QUESTION IS MEANT PURELY THEORETICALLY AND NOT PRACTICALLY AT ALL!! According to Deuteronomy (12: 2) idolatrous sites are to be destroyed under certain circumstances. אַבֵּד ...
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Ein Halakha K'niflag

This article cites a principle in the name of R. Saadya Gaon and Rambam that אין הלכה כנפלג. He cites כתבים לגר"י קאפח, ח"ב עמ' 557. Where can this be found in the writings of the Geonim or Rambam? ...
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What does the Rambam say about ghosts?

I simply want to know what the Rambam thinks about ghosts, spirits, demons, and things like that.
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Rambam on color certainty of tekheleth

According to a questioner on this page, the Rambam in the Pirush HaMishna contradicts the Rambam in Hilchoth Tzitzith regarding whether we can dye tekheleth due to uncertainty about the color. Where ...
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Source of “Koteret”

I have heard Rambam's presentation of the mitzvos at the beginning of each set of halachos referred to as the כותרת (koteret). What is the source for this usage?
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R. Moses al-Ashkar's Response to Sefer ha-Emunot

Where can I find the Maharam al-Ashkar's response to Shem Tov ibn Shem Tov's Sefer ha-Emunot (Hassagot Al Mah She-Katab R. Shem-Tov Neged ha-RaMbaM)?
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Are We Biblically Commanded to Study the Oral Law According to Maimonides?

Rambam writes in Hil. Talmud Torah (1:7) that one must pay to teach his son the entire written Torah. וְחַיָּב לְלַמְּדוֹ בְּשָׂכָר עַד שֶׁיִּקְרָא תּוֹרָה שֶׁבִּכְתָב כֻּלָּהּ Kessef Mishna ...
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Online classes on Moreh Nevuchim in English?

Does anyone know of English classes online for the Rambam's Moreh Nevuchim?
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RaMBa“M's ”Wondrous Point“ about cooking ”treif" meat from a Kosher animal with milk undermined by a simple Gemara?

Beitzah 12b seems to undermine RaMBa"M's Nekudah Niflaah that cooking and enjoying (not eating) Basar Tehorah Neveilah with milk is Mutar. Beitzah 12a-12b has R' Yohanan appalled at the suggestion ...
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Hebrew text for Rambam's letter to Ovadia the Ger online and good Hebrew shiur on it

Does anyone know where I can find the Hebrew text for the Rambam's letter to Ovadia the Ger online, and a good Hebrew language shiur on it?
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Article of R. Dr. Twersky on Mishne Torah

Is R. Dr. Yitzchak Twersky's article: "Some Non-Halakhic Aspects of the Mishneh Torah," published in: Jewish Medieval and Renaissance Studies, ed. A. Altmann (Cambridge, 1967), pp. 95-118, available ...
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Authorship of Summarized Sefer Hamitzvos

Are there any sources that claim that Rambam didnt author the summarized sefer hamitzvos (מנין מצות הקצר)?
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Writings of R. David Hanaggid

Are the Midrash David on Mo'adim of R. David Hanaggid, or any of his other writings (besides for the Midrash David on Avos) available for free online?
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Citing the Jerusalem Talmud and Mishna Torah [duplicate]

How would you write an academic citation (format agnostic) for the Jerusalem Talmud or the Mishna Torah? i.e. a specific quote from each. I'm specifically asking about these as there is no standard ...
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The Vilna Gaon's distinction between the Rambam and the Ramban

I heard quoted in the name of the Vilna Gaon that (one of) the differences between the Rambam and the Ramban is that that Rambam held reality to be an 'Objective Reality' while the Ramban held that ...
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Maimonides' 13 Principles

What are the earliest sources who state that the thirteen principles of Maimonides are authoritative?
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Kohanim slept on guard?

The very start of mishnayos maseches Midos mentions that the kohanim guarded the bes hamikdash in three locations, including bes hamokad, a room on the north side of the mikdash courtyard. The mishna ...
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Rambam and 10 Malachim

In Yesodei HaTorah 2:7, The Rambam lists 10 malachim (angels) in order of power. Many people have told me that this halacha proves that the Rambam knew Kabalah, since this knowledge is nowhere found ...
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Why have great rabbis written of their hard times?

Rambam: And that was a most terrible event as my brother drowned in the Indian Ocean, he had taken such care of me and now I was left alone and bewildered in a strange land. Rabbi Moshe ...
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Did the sages know Maaseh Bereishis?

According to some, Maaseh Bereishis means science and Maaseh Merkava means meta-physics. The Gemara mentions many scientific (and health) statements, many of which the Rambam famously held were ...
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rambam saying if someone cheated you

I remember learning in Rambam that in cases where the one that was cheated can not prove it he says something like "the one that cheated me should be ..." what is the correct saying, i am ...