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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Does Bleeding on the 11th Day Join Bleeding on the 12th Day of the Zav Days?

According to Rambam in Hilchot Isurai Biyah: רָאָת דָּם בָּעֲשִׂירִי מִיְּמֵי זִיבָתָהּ, וּבָאַחַד עָשָׂר, וּבִשְׁנֵים עָשָׂר--אַף עַל פִּי שֶׁרָאָת בִּשְׁלוֹשָׁה יָמִים זֶה אַחַר זֶה--אֵינָהּ ...
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Is there any significance in the 10th of Rambam's 13 Principles of Faith quoting a Passuk?

If you read Rambam's 13 Ani Maamin's, 13 Principles of Faith, you'll note that only the 10th one makes reference to Tanach. Is there a reason for that? (Looking for sourced answer, rather than ...
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Jews allowed to pray and join Muslim congregation in Mosques and Experiences

I had read somewhere in Maimonidian literature that Jews are allowed to pray in Mosques. Is it even allowed for them to Join the Muslim congregation and pray the Salat for they worship the same God (...
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Eliyahu HaNavi's role in Moshiach's arrival according to the Rambam

The Rambam says in Hilchos Malachim 12:2: There are some Sages who say that Elijah's coming will precede the coming of the Mashiach. All these and similar matters cannot be definitely known by man ...
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Can I have sifrei kodesh in my bedroom?

Since I may be naked in my bedroom, is it possible to have sifrei kodesh in it (according to the Talmud or the Rambam)?
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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 ...
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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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Divrei Kabbalah in Maimonides' Usage

Rambam in the Laws of Fast Days (4: 7) writes that verses are recited from "Divrei Kabbalah" and from "Kitvei Kodesh" (holy writings). וּפְסוּקִים מִדִּבְרֵי קַבָּלָה וּמִכִּתְבֵי הַקֹּדֶשׁ ...
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How often should one have marital intercourse with his wife?

What is the frequency of marital intercourse prescribed by Halacha? I am confused as the Talmud in Ketubot 61b says that for men of independent means it is every day. But the Rambam in Mishneh ...
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According to the Rambam, if I make a vow and I realize that it was based on an error, is it still binding?

If, for example, I say that I won't eat tomatoes but my intention was to make a neder about "not eating red vegetables" (this is why I said tomato). A year after, I realize that a tomato is a fruit ...
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According to the Rambam, how do you shake the lulav?

How do you shake the arba minim according to the Rambam?
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Losing concentration in the middle of the first blessing of Shemoneh Esrei

First, a little background information: According to halakhah, there are two types of berakhoth: "long" and "short." "Long" *berakhoth" are those that have a pethihah ("opening", i.e. "Barukh Atah ...
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Omission from Koteret to Hil. Talmud Torah

The Rambam wrote small introductions to sections of Mishna Torah called a Koteret. In the introduction to Hilchos Talmud Torah he writes: יש בכללן שתי מצוות עשה--(א) ללמוד תורה; (ב) לכבד מלמדיה ...
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What does the Rambam mean by בשרו חם?

In Hilkhot De'ot 3:7 (3:2 in non-Yemenite versions) the Rambam writes: For example, a person with warm constitution (בשרו חם) should not eat meat or honey... What exactly is meant by "warm ...
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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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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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In Rambam's negative theology, why are G-d's attributes of action considered something that we can know about G-d?

In Rambam's negative theology, there is a distinction between descriptions of G-d's essence (which we can only speak about in negative terms, e.g. G-d is not physical, non temporal, non ignorant, etc.)...
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Is there any precedent to read the first 11 chapters of Genesis as metaphorical?

I believe this will be related to a similar question about a statement by Rabbi Sacks. Rabbi Jeremy Wieder said in a lecture titled Non Literal Interpretation of Scripture in Jewish Tradition (and ...
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In Hilkhot Teshuvah 3:7 the Rambam says one who believes in more than one ruler is a heretic. What is the basis for this?

In Hil. Teshuvah 3:7 of the Mishneh Torah (in his listing of heretics - minim), the Rambam makes the following statement: והאומר שיש שם מנהיג אבל הן שנים או יותר "The one who says there is indeed a [...
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If Christianity is avodah zarah and Islam is not, why has the Christian world triumphed over the non-Christian, and why do Jews prefer to live among Christians and not Muslims?

The Rambam quite clearly considered Christianity to be avodah zarah. He did not feel the same way about Islam, however, going so far as to condone praying within a mosque, and many Orthodox Jewish ...
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Washing After Leaving Cemetary

What are the earliest sources (i.e. Chazal or Rishonim) for washing one's hands after visiting a cemetery? Is this mentioned by the Rambam?
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What are “secrets of Torah” according to the Rambam?

The Rambam explicitly acknowledges that there is something called "secrets of Torah." His words (or at least R' Kapach's translation of his words) are (Moreh Nevochim 2:33): שאי אפשר להכנס למעמד ...
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Igros K'naos Regarding Rambam

Where could I find the Igros K'naos regarding Rambam's works for free online? In particular I am looking for a quote from Radak about the aggados there. A screenshot of that page would suffice.
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Moreh Nevuchim Online

Is the Hebrew text of Maimonides' Moreh HaNevuchim available for free online? (In text form rather than Pdf).
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Not allowing one's tzitzis to show in a cemetary according to the Rambam

It's brought down in the Gemera in Brachos Daf 18a and paskened in Shulchan Aruch Siman OC 23:1 that a person shouldn't go into a beis hakavoros (cemetery) with his tzitzis visible because of "la'ag l'...
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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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Rambam claiming some of Hazal were superstitious

I forgot where, but I remember reading the Rambam z"l saying that some Hazal believed in superstitions, ideas such as ayeen haro because they lived in small villages with lack of science, and ...
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From Moshe to Moshe… no one greater?

On Maimonides tomb is written the epitaph: “From Moshe to Moshe, none arose like Moshe!” We can read in many sources (e.g. http://asknoah.org/essay/rambam) that this implies Rambam was the greatest ...
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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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Maimonides' Responsum on Pre-Sinaic Mitzva Observance

The Maimonides Reader (p. 478) quotes Maimonides' responsum to Hasdai Ha-Levi where he states that our forefathers didn't keep the mitzvos at all. Where else can this responsum be found? (...
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Where to tie the Maimonidean half-tekheleth?

According to the Rambam that the tekhelet strand if only half-dyed, where exactly should the halfway-mark (or, in the strings I've seen, the transition portion) fall? Should it be up against the hole ...
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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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Illustrated hilchot Kiddush Hachodesh

I remember seeing about 20 years ago a beautiful annotated commentary on Rambam's hilchos kiddush hachodesh, with extensive illustrations and calculations, explained according to both ancient and ...
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Making a siyum on a chelek of the Rambam

Is making a siyum on a chelek (section) of the Rambam good enough to absolve one from fasting taanis bechoros, or allowing one to eat meat during the nine days? I have never seen someone make a siyum ...
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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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Is Rambam's opinion about Nidda and Zava cycle rejected?

There's a famous minority opinion of Rambam that, Biblically, the nidda and zava cycle is continuous--7-11-7-11-7 days ad infinitum, and that most Rishonim argue on him and hold the cycle is 7-11 days ...
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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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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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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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Rambam, Shkiah, and Tzet HaKokhavim

In the dispute between the Geonim and Rabbenu Tam over the definition of nightfall, I have seen the Rambam claimed by either side - each claiming that in the Mishneh Torah he held like them. My ...
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Did the Rambam write in response to the Ibn Ezra?

According to some interpretations (including, it seems, the explanations of Spinoza) the Ibn Ezra's commentary makes allusion to the idea that some of the Torah (beyond the talmudic discussion of the ...
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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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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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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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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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Responsum of Maimonides Regarding Translating Mishne Torah

The Maimonides Reader (p. 478) quotes Rambam's responsum to Ibn Gabir regarding translating the MT (also referenced here). He responds to a request from this Arabic speaker who was able to learn ...
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What was the earliest use of the Rambam's language in Shmita V'Yovel in support of kollel study?

Here's the Rambam, waxing poetic at the end of Laws of Shmita and Yovel (and his entire volume of Zeraim): ולא שבט לוי בלבד, אלא כל איש ואיש מכל באי העולם אשר נדבה רוחו אותו והבינו מדעו להיבדל ...
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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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What were the Rambam's sources?

In the introduction to the Mishneh Torah, the Rambam indicates that his compilation of the entire Oral Torah is derived from a few key Jewish texts: ואין צריך לומר הגמרא עצמה הבבלית והירושלמית ...