Бамидбар 15:31 Комментарий: Rashi, Ramban, Rabbeinu Bahya & Chizkuni

דבר ה׳ [BECAUSE HE HATH SCORNED] THE WORD OF THE LORD — The prohibition of idolatry (אנכי and לא יהיה לך) the people heard from the mouth of the Lord but all the other commandments from the mouth of Moses (therefore the prohibition of idolatry is called דבר ה׳ “the utterance of the Lord”) (cf. Sifrei Bamidbar 112:2; Sanhedrin 99a).

HIS INIQUITY SHALL BE UPON HIM. “This means only as long as his iniquity is upon him, but not after he has repented.” This is Rashi’s language, from the words of our Rabbis.²¹⁰Shebuoth 13a.
According to the plain meaning of Scripture, this expression [his iniquity shall be upon him] is like: their blood shall be upon them;²¹¹Leviticus 20:27. they shall bear their sin; they shall die childless;²¹²Ibid., Verse 20. he hath uncovered his sister’s nakedness; he shall bear his iniquity,²¹³Ibid., Verse 17. [the meaning of all these verses being that the guilty have brought the punishment upon themselves]. Now I have seen in the Pirkei Derech Eretz²¹⁴This is also quoted therefrom by the Ricanti. I have not found it in our texts of this treatise. [the following text]: “What is [the meaning of the expression], his iniquity shall be upon him? It teaches us that the soul is cut off, and [yet] its iniquity is upon it.” That is to say, the sin attaches to it [the soul] even after it is cut off, and it is punished in suffering forever, similar to [the verse], for their worm shall not die, neither shall their fire be quenched.²¹⁵Isaiah 66:24.

כי דבר ה' בזה, “for he scorned the word of the Lord.” The entire Torah is included in the description “the word of the Lord.” When someone deliberately commits an act of idolatry he has therefore shown contempt for the entire Torah.

עונה בה [THAT PERSON SHALL UTTERLY BE CUT OFF] HIS INIQUITY IS UPON HIM — only at the time when (under the circumstances that) his iniquity is upon him shall he be cut off, i.e., in the case that he has not repented (Sanhedrin 90b).