Talmud - Nedarim 90a נדרים צ׳ א׳

And Rav Aḥa bar Rav Huna then smeared him with clay to protect him from the elements, as it was now prohibited for him to benefit from the world by wearing clothes. And he then brought him before Rav Ḥisda, to dissolve his vow. Rava said: Who is wise enough to act in this manner, if not Rav Aḥa bar Rav Huna, who is a great man? As he holds that just as the Rabbis and Rabbi Natan disagree with regard to nullification, whether it is possible to nullify a vow that has yet to take effect, so too, they disagree with regard to a request made to a halakhic authority to dissolve a vow, whether it is possible to request dissolution of such a vow. Rav Aḥa bar Rav Huna’s plan was to have the vow go into effect, so that the man could request that it be dissolved.

And Rav Pappi said with regard to this issue: The dispute between Rabbi Natan and the Rabbis is with regard to nullification only, as Rabbi Natan holds that a husband can nullify a vow only once the vow has taken effect, as it is written: “And the moon shall be confounded [ḥafera]” (Isaiah 24:23). He employs this phrase as an allusion, interpreting the word ḥafera as if it were hafara, nullification, and concludes from here that only a vow that already exists, like the moon, can be nullified. And the Rabbis hold that a husband can nullify a vow even though the vow has not yet taken effect, as it is written: “He nullifies the thoughts of the crafty” (Job 5:12), implying that nullification pertains even to thoughts, to prevent them from going into effect.

But with regard to a request made to a halakhic authority to dissolve a vow, everyone, both Rabbi Natan and the Rabbis, agrees that a halakhic authority cannot dissolve anything unless the vow has already taken effect, as it is written: “He shall not profane his word” (Numbers 30:3), which indicates that the person himself who took the vow cannot profane his words and dissolve his vow, but a halakhic authority may do so. This, however, applies only if the vow has already gone into effect, as it says: “His word.”

The Gemara suggests: Let us say that the following baraita supports Rav Pappi’s opinion: If one says: The property of so-and-so is konam for me, and for that reason I will not benefit from it, and deriving benefit from he who I will request dissolution for the vow is also konam for me, then, if he desires to dissolve the vows he must first request dissolution with regard to the first vow, and afterward he can request dissolution with regard to the second. And if you say that one can request dissolution of a vow even though the vow has not yet taken effect, why must he request dissolution of his two vows in the above order? If he so wishes, he can first request dissolution with regard to this vow, and if he wishes, he can first request dissolution with regard to that one.

The Gemara refutes this argument: And does he know if this vow is first or if that vow is last? The baraita does not specify which vow is first and which is last. Perhaps first and last is referring not to the order in which the two vows were taken, but rather to the order in which they are dissolved, so that if he so wishes, he can first request dissolution of the vow not to derive benefit from the halakhic authority from whom he will request dissolution of his vow.

Rather, let us say that a different baraita supports Rav Pappi’s opinion: If one says: The property of so-and-so is konam for me, and for that reason I will not benefit from it, and I am hereby a nazirite for when I will request dissolution of this vow, if he desires to dissolve the vows he must first request dissolution with regard to his vow not to derive benefit from a particular person, and afterward he can request dissolution with regard to his vow of naziriteship that he accepted upon himself should he request dissolution of his first vow.

And if you say that one can request dissolution of a vow even though the vow has not yet taken effect, why must the two vows be dissolved in that order? If he so wishes, he can first request dissolution with regard to his vow not to derive benefit from that other person, and if he wishes, he can first request dissolution with regard to his vow of naziriteship. The Gemara rejects this argument: This is no proof, as it is possible that the baraita is taught in accordance with the opinion of Rabbi Natan, who maintains that a vow can be nullified only after it has gone into effect. The Rabbis, however, dispute this view.

Ravina said: Mareimar said to me: This is what your father said in the name of Rav Pappi: The dispute between Rabbi Natan and the Rabbis is with regard to nullification only, as Rabbi Natan holds that a husband can nullify a vow only once the vow has taken effect, whereas the Rabbis hold that a husband can nullify a vow even though the vow has not yet taken effect. But with regard to a request made to a halakhic authority to dissolve a vow, everyone, both Rabbi Natan and the Rabbis, agrees, that he can dissolve the vow even though the vow has not yet taken effect. As it is written: “He shall not profane his word” (Numbers 30:3), which Ravina expounds as follows:

Traduction : The William Davidson digital edition of the Koren Noé Talmud, with commentary by Rabbi Adin Even-Israel Steinsaltz.

Nedarim 90a examines whether a sage can dissolve a vow before it takes effect, contrasting nullification and dissolution through Rabbi Natan and the Rabbis.