The absolute demand for loyalty to God supersedes the influence of any charismatic leader, miracle worker, or supernatural visionary. When an individual's teachings contradict the foundational principles of faith, their spiritual rhetoric and apparent wonders hold no weight. Anyone attempting to uproot the worship of God faces the severest consequences, regardless of the methods they employ.
To encompass every possible avenue of influence, accountability is applied to both the established prophet and the dreamer of dreams. If only a prophet were held accountable, one might assume a dreamer is exempt, as dreams do not inherently demand obedience. Conversely, if only a dreamer were penalized, one might mistakenly believe that an established prophet could be pardoned for issuing a temporary directive to engage in idolatry [אור החיים]. However, the ultimate penalty applies exclusively to an individual acting with clear, deliberate intent, entirely exempting anyone who acts under duress, by mistake, or out of confusion [תורה תמימה, מלבי״ם, אדרת אליהו].
The consequence for this level of deception is death. The primary approach among commentators is that this execution is carried out through stoning, mirroring the standard penalty for anyone who instigates idolatry. A minority viewpoint, however, argues for strangulation, which serves as the default method whenever a death penalty is left unspecified [בכור שור, מלבי״ם].
The severity of this punishment stems from the nature of the crime—speaking falsehood against God. This deception is understood in several ways. Some define it as an outright lie, a complete fabrication of a directive God never issued [רש״י, אדרת אליהו, שד״ל]. Others explain that the terminology implies deviation, representing calculated words designed specifically to turn the people away from God [אבן עזרא, חזקוני, רא״ש]. The gravity of the act lies in forging the divine word. Even if the false prophet speaks in God's name and performs visible miracles, he is actively rebelling against the Kingdom of Heaven and denying the indisputable, public revelation at Mount Sinai [ספורנו, רבנו בחיי, מלבי״ם]. Another perspective suggests that this deception is an attempt to uproot the very concept of Divine Providence. The false prophet argues that God is too exalted to involve Himself in the physical world, thereby insisting that humanity must worship intermediary forces [הכתב והקבלה].
To counter such claims, the historical memory of the Exodus and the redemption from slavery is invoked. This is not merely a historical recap; it serves as undeniable proof of God's direct providence over the world and establishes an absolute duty of loyalty, completely invalidating the false prophet's assertions [ביאור יש״ר]. The dual emphasis on being brought out of Egypt and redeemed from a house of slaves serves to reinforce this obligation. The mere act of being taken out of Egypt is sufficient to demand unwavering loyalty, making the added rescue from brutal slavery an even deeper binding force [רש״י, מזרחי]. Alternatively, this duality points to two distinct phases of redemption. The redemption occurred at night, when the Plague of the Firstborn served as a ransom for the Israelites, while the bringing out occurred during the day, when the nation departed triumphantly against the will of their captors [הכתב והקבלה, אדרת אליהו]. Ultimately, this monumental rescue was designed to sever their servitude to Pharaoh, breaking the spiritual and astrological forces of Egypt that sought to keep them captive [אלשיך], and transforming them exclusively into servants of God [דברי דוד].
The false prophet's goal is to lead the people astray from the prescribed path. This deviation does not require a complete abandonment of faith; attempting to alter even a fraction of the path—such as nullifying minor details of the laws against idolatry—constitutes full deviation. This applies equally to positive and negative Commandments [תורה תמימה, אדרת אליהו]. Even if the deceiver does not call for an overt rebellion, but instead falsely claims that God Himself commanded the worship of idols, he is entirely guilty of leading the people astray [ספורנו].
The directive to eradicate this evil from the community transcends the legal requirement of punishing a criminal. It is a profound spiritual act meant to uproot the evil inclination and halt its spread within the hearts of the people [אור החיים]. Removing a false prophet is likened to amputating a diseased limb to save the rest of the body, a necessary measure to prevent a malignant spiritual illness from infecting the entire nation [אלשיך]. The imperative to cleanse this corruption is so vital that if the perpetrator manages to escape, there remains a binding obligation to pursue him and bring him to justice, ensuring the complete and final removal of the evil [תורה תמימה].