It is forbidden to falsely claim prophecy in Hashem’s Name.
This mitzvah forbids one from claiming that Hashem commanded or revealed something when He did not. Such a false prophet undermines the foundation of Torah, which rests upon the authenticity of prophecy at Sinai. Rambam (Hilchot Yesodei HaTorah 10:1) explains that even if the prophet teaches what is consistent with Torah, if it is falsely claimed as Divine speech, it is forbidden.
The Talmud (Sanhedrin 89a–90a) classifies three types of false prophets: one who prophesies what he was not commanded, one who withholds what he was commanded, and one who prophesies in idols’ names. Speaking falsely in Hashem’s Name is considered an act of rebellion against Heaven itself. Sefer HaChinuch (Mitzvah 517) emphasizes that this sin erodes trust in true prophets and desecrates Hashem’s covenant. Rashi (Deut. 18:20) stresses that the very act of attaching Hashem’s Name to lies is itself worthy of death. Ramban notes this mitzvah protects the sanctity of prophecy as the channel through which Torah is revealed. Midrash (Sifrei Devarim 177) warns that this sin “destroys the pillars of faith” by confusing truth with deception.
Commentary & Classical Explanation:
Contrast with Mitzvah 42 (Not to prophesy in idols’ name):
Parallel to Mitzvah 43 (Not to listen to a false prophet):
Guarding Against False Spiritual Claims
Responsible Rabbinic Leadership
Public Religious Messaging
Digital Age Dangers
Safeguarding Trust in Torah
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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.
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.
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.
Pertains to the power of speech—both positive and negative—including lashon hara, vows, and blessings.
Signifies awe and reverence toward Hashem—living with awareness of His greatness and presence.
Represents the concept of spiritual intentionality, purity, and sanctity—set apart for a higher purpose.
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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