42

Not to prophesize in the name of idolatry

The Luchos - Ten Commandments
אַ֣ךְ הַנָּבִ֡יא אֲשֶׁ֣ר יָזִיד֩ לְדַבֵּ֨ר דָּבָ֜ר בִּשְׁמִ֗י אֵ֣ת אֲשֶׁ֤ר לֹֽא־צִוִּיתִיו֙ לְדַבֵּ֔ר וַאֲשֶׁ֣ר יְדַבֵּ֔ר בְּשֵׁ֖ם אֱלֹהִ֣ים אֲחֵרִ֑ים וּמֵ֖ת הַנָּבִ֥יא הַהֽוּא׃ - פָּרָשַׁת שׁוֹפְטִים
Deuteronomy 18:20 - "But the prophet who presumes to speak a word in My Name which I have not commanded him to speak, or who shall speak in the name of other gods—that prophet shall die."

This Mitzvah's Summary

מִצְוָה עֲשֵׂה - Positive Commandment
מִצְוָה לֹא תַעֲשֶׂה - Negative Commandment
Idolatry – עֲבוֹדָה זָרָה

It is forbidden to falsely claim prophecy in the name of idolatry.

This mitzvah prohibits declaring messages as prophecy from false gods. Unlike mistaken interpretation, this act is deliberate fraud, attributing authority to idolatry. Rambam (Hilchot Avodat Kochavim 5:7–8) explains that one who claims prophetic speech in the name of avodah zarah is judged as a false prophet and executed by strangulation.

The Talmud (Sanhedrin 89a) distinguishes between three categories: one who prophesies what he was not commanded, one who suppresses what he was commanded, and one who speaks in the name of idols. The last is considered most grievous. Sefer HaChinuch (Mitzvah 515) emphasizes that such claims undermine the very foundation of Torah, as they compete with Hashem’s direct revelation. Rashi (Deut. 18:20) notes that invoking “other gods” as prophetic authority is rebellion against Heaven. Ramban stresses that this mitzvah safeguards the integrity of true prophecy as a channel of Torah, preventing confusion between holy speech and idolatrous manipulation. Midrash (Sifrei Devarim 176) calls false prophecy in idols’ names “treachery clothed in holiness.”

Commentary & Classical Explanation:

  • Rambam (Avodat Kochavim 5:7–8): Rules that a prophet invoking idols is executed.
  • Sefer HaChinuch (515): Explains the danger of undermining Torah through false prophecy.
  • Talmud (Sanhedrin 89a): Lists this as one of the most severe forms of false prophecy.
  • Rashi (Deut. 18:20): Notes rebellion against Heaven inherent in this act.
  • Ramban: Safeguards true prophecy’s sanctity.
  • Midrash (Sifrei Devarim 176): Calls it treachery cloaked in holiness.

Contrast with Mitzvah 44 (Not to falsely prophesy in Hashem’s name):

  • Mitzvah 42 concerns speaking in idols’ names.
  • Mitzvah 44 concerns falsely claiming Hashem’s words.
  • Rambam (Yesodei HaTorah 10:1–3) distinguishes: one attacks Torah from within, the other from without.

Parallel to Mitzvah 43 (Not to listen to a false prophet):

  • Mitzvah 42 forbids giving prophecy in idols’ names.
  • Mitzvah 43 forbids legitimizing such speech by listening.
  • Talmud (Sanhedrin 90a) pairs them as two sides of protecting Torah’s sanctity.
(Source: Chabad.org)

Applying this Mitzvah Today

False Prophets in Modern Guises

  • Rambam (Hilchot Avodat Kochavim 11:4) rules that even claiming prophecy in the name of an idol is a capital offense. Today, while no one stands in the town square declaring idol-based prophecy, many leaders claim “divine visions” or “new revelations” outside Torah. The mitzvah guides us to reject such figures and their movements, whether in cults, new-age sects, or fringe groups.

Guarding the Integrity of Torah

  • Sefer HaChinuch (Mitzvah 513) explains that prophecy is the most powerful way to transmit Torah. If misused for idolatry, it corrupts the very foundation of emunah. In modern life, this applies to resisting any teaching that claims to supplement or replace Torah with external revelation, even if clothed in “spiritual language.”

Charismatic Influencers

  • Talmud (Sanhedrin 90a) warns that false prophets use charisma and spectacle to sway people. Today, social media influencers who blend “spiritual wisdom” with foreign worship or anti-Torah values mirror this danger. This mitzvah demands discernment: we must evaluate leaders not by charisma but by fidelity to Torah.

Interfaith Boundaries

  • Ramban (Deut. 18:20) notes that prophecy belongs exclusively to Israel’s covenant with Hashem. In today’s interfaith settings, this mitzvah instructs Jews not to confuse “universal spirituality” with Torah prophecy. Dialogue can occur, but prophecy and revelation remain sacredly bounded.

Education Against Spiritual Exploitation

  • Midrash Tanchuma (Shoftim 13) stresses that false prophecy is designed to exploit trust. In our day, Jewish education must equip communities to recognize manipulation — whether through false messianic claims, cult recruitment, or “prophets” selling spiritual authority. This mitzvah calls for awareness and prevention.

Notes on this Mitzvah's Fundamentals

Idolatry – עֲבוֹדָה זָרָה

  • Rambam (Avodat Kochavim 5:7–8) rules that one who claims idols’ words as prophecy undermines Hashem’s kingship. Talmud (Sanhedrin 89a) stresses that this is not mere idolatry but fraud dressed as holiness. Sefer HaChinuch (515) explains that this spreads avodah zarah by hijacking the credibility of prophecy.

Prophecy – נְבוּאָה

  • Rambam (Yesodei HaTorah 7:7) codifies true prophecy as requiring sanctity and truth. A false prophet in idols’ names undermines prophecy itself. Talmud (Sanhedrin 90a) warns that such speech severs the line of true revelation. Ramban insists that preserving prophecy’s purity is essential for Torah.

Faith – אֱמוּנָה

  • Rashi (Deut. 18:20) notes that invoking idols as prophetic sources shatters emunah. Midrash (Sifrei 176) calls this “treachery,” eroding Israel’s trust in Hashem’s word. Sefer HaChinuch stresses that it breeds doubt in Torah, the foundation of faith.

Core Beliefs – יְסוֹדוֹת הָאֱמוּנָה

  • Rambam (Sefer HaMitzvot, Negative Commandment 22) includes this as fundamental, for prophecy is the basis of Torah’s truth. Ramban emphasizes that protecting Israel’s core beliefs requires clear boundaries: Hashem alone speaks through prophets.

Speech – דָּבָר

  • Talmud (Sanhedrin 89a) shows how words of false prophecy mislead entire generations. Rambam warns that speech claiming idol authority corrupts the power of language itself, which Torah sanctifies. Rashi stresses that Torah forbids even a single utterance.

Reverence – יִרְאַת שָׁמַיִם

  • Rambam and Sefer HaChinuch explain that awe of Heaven demands rejecting any prophetic fraud. Midrash (Sifrei 176) calls false prophecy a betrayal of yirat Shamayim, pretending to honor Heaven while dishonoring Him.

Justice – צֶדֶק

  • Ramban insists that justice requires punishing false prophets swiftly. Talmud (Sanhedrin 89a) codifies capital punishment for them, ensuring that justice upholds covenantal truth. Sefer HaChinuch explains that sparing them would be injustice to the nation’s faith.

Bein Adam L’Makom – בֵּין אָדָם לְמָקוֹם

  • Rambam (Yesodei HaTorah 10:1) calls false prophecy rebellion directly against Hashem. Sefer HaChinuch teaches that this mitzvah expresses Israel’s covenant with G-d by protecting His exclusive voice. Rashi adds that no act severs Bein Adam L’Makom more deeply than attributing lies to idols.

This Mitzvah's Fundamental Badges

Idolatry - עֲבוֹדָה זָרָה

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Mitzvot that prohibit worship of false gods and practices associated with idol worship.

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Prophecy - נְבוּאָה

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Associated with belief in and obedience to G‑d’s prophets, as well as reverence for their role in transmitting Divine truth.

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Faith - אֱמוּנָה

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Represents Emunah—the deep, inner trust in Hashem’s presence, oneness, and constant involvement in our lives. This badge symbolizes a heartfelt connection to G-d, rooted in belief even when we cannot see. It is the emotional and spiritual core of many mitzvot.

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Core Beliefs - יְסוֹדוֹת הָאֱמוּנָה

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Used for mitzvot that reflect Judaism’s foundational principles—belief in G-d, reward and punishment, prophecy, Torah from Heaven, and more. These commandments shape the lens through which all others are understood.

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Speech - דָּבָר

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Pertains to the power of speech—both positive and negative—including lashon hara, vows, and blessings.

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Reverence - יִרְאַת שָׁמַיִם

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Signifies awe and reverence toward Hashem—living with awareness of His greatness and presence.

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Between a person and G-d - בֵּין אָדָם לְמָקוֹם

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Mitzvot that define and deepen the relationship between a person and their Creator. These include commandments involving belief, prayer, Shabbat, festivals, sacrifices, and personal holiness — acts rooted in divine connection rather than human interaction.

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