לֹ֣א אִ֥ישׁ אֵל֙ וִֽיכַזֵּ֔ב וּבֶן־אָדָ֖ם וְיִתְנֶחָ֑ם הַה֤וּא אָמַר֙ וְלֹ֣א יַעֲשֶׂ֔ה וְדִבֶּ֖ר וְלֹ֥א יְקִימֶֽנָּה׃
Dieu n’est pas un mortel, pour mentir, ni un fils d’Adam, pour qu’il se ravise; est-ce lui qui parle et ne tient point parole? Qui affirme et n’exécute point?
Mishneh Torah, Foundations of the Torah
It is a clear and manifest principle concerning the Torah that as a Law it is permanently established forever and evermore; and that it is not subject to mutibility, nor to diminution, nor to amendment; for it is said: "All this word which I command you, that shall ye observe to do; thou shalt not add thereto, nor diminish from it" (Ibid. 13.1); and it is further said: "But the things that are revealed belong unto us and to our children forever, that we may do all the words of this law" (Ibid. 29.28). Herefrom we learn that according to all the words of the Torah we are commanded to do forever. It is, moreover, said: "a statute forever throughout your generations" (Num. 15.15); and again it is said:1See Baba Mezi’a 59. C. "It is not in heaven" (Deut. 30.12); herefrom we learn that no prophet is thereafter permitted to make any innovation. Therefore, should a man rise up, whether he be from among the Gentiles or whether from among Israel, and deliver a token and perform a miracle saying, that God hath sent him to add a commandment, or to diminish a commandment, or to interpret a certain commandment of among the commandments with such interpretation as we have not heard by tradition from Moses; or he said, that these commandments with which Israel was charged are not forever and throughout all generations, but that they were commandments in keeping with those times only, behold him, he is a false prophet, seeing that he came to deny the prophecy of Moses; and his punishment is death by strangulation, because he wilfully spoke in the name of God concerning that which He did not charge him; for He, blessed is He! commanded Moses, saying, that this enactment was "unto us and unto our children forever" (Deut. 29.28); and, "God is not a man that He should lie" (Num. 23.19).