Mishnayos Nedarim Perek 10 Mishnah 7

One who says to his wife: All vows that you will vow from now until I arrive from such and such a place are hereby ratified, has not said anything, i.e., the vows are not ratified. However, if he states that all vows that she will take until then are hereby nullified, Rabbi Eliezer said: They are nullified, while the Rabbis say: They are not nullified. Rabbi Eliezer said in explanation: If one can nullify vows that have reached the status of a prohibition, i.e., that have already taken effect, shall he not be able to nullify vows that have not reached the status of a prohibition? The Rabbis said to him in response: The verse states: “Every vow, and every binding oath to afflict the soul, her husband may ratify it, or her husband may nullify it” (Numbers 30:14). This teaches: That which has reached the status of eligibility for ratification, i.e., a vow that she has already taken, has reached the status of eligibility for nullification. However, a vow that has not reached the status of eligibility for ratification has not reached the status of eligibility for nullification either, and it cannot be nullified.

הָאוֹמֵר לְאִשְׁתּוֹ, כָּל הַנְּדָרִים שֶׁתִּדְּרִי מִכָּאן עַד שֶׁאָבֹא מִמָּקוֹם פְּלוֹנִי, הֲרֵי הֵן קַיָּמִין, לֹא אָמַר כְּלוּם. הֲרֵי הֵן מוּפָרִין, רַבִּי אֱלִיעֶזֶר אוֹמֵר, מוּפָר. וַחֲכָמִים אוֹמְרִים, אֵינוֹ מוּפָר. אָמַר רַבִּי אֱלִיעֶזֶר, אִם הֵפֵר נְּדָרִים שֶׁבָּאוּ לִכְלָל אִסּוּר, לֹא יָפֵר נְדָרִים שֶׁלֹּא בָאוּ לִכְלָל אִסּוּר. אָמְרוּ לוֹ, הֲרֵי הוּא אוֹמֵר, אִישָׁהּ יְקִימֶנּוּ וְאִישָׁהּ יְפֵרֶנּוּ (במדבר ל), אֶת שֶׁבָּא לִכְלָל הָקֵם, בָּא לִכְלָל הָפֵר. לֹא בָא לִכְלָל הָקֵם, לֹא בָא לִכְלָל הָפֵר: