Nedarim11: 6
אָמְרָה: ,,קוֹנָם תְּאֵנִים וַעֲנָבִים אֵלּוּ שֶׁאֵינִי טוֹעֶמֶת”, קִיֵּם לַתְּאֵנִים — כֻּלּוֹ קַיָּם; הֵפֵר לַתְּאֵנִים — אֵינוֹ מוּפָר עַד שֶׁיָּפֵר אַף לָעֲנָבִים. אָמְרָה: ,,קוֹנָם תְּאֵנִים שֶׁאֵינִי טוֹעֶמֶת וַעֲנָבִים שֶׁאֵינִי טוֹעֶמֶת” — הֲרֵי אֵלּוּ שְׁנֵי נְדָרִים.
[If] she said: “Konam, these figs and grapes, with respect to my tasting [them],” [and] he confirmed [the neder with regard] to figs, it becomes confirmed in its entirety; if he revoked the neder with regard to figs, it is not revoked until he revokes it with regard to grapes as well. [If] she said: “Konam, figs with respect to my tasting [them], and grapes with respect to my tasting [them],” these are two nedarim.
Nedarim11: 7
,,יוֹדֵעַ אֲנִי שֶׁיֵּשׁ נְדָרִים, אֲבָל אֵינִי יוֹדֵעַ שֶׁיֵּשׁ מְפִירִין” — יָפֵר. ,,יוֹדֵעַ אֲנִי שֶׁיֵּשׁ מְפִירִין, אֲבָל אֵינִי יוֹדֵעַ שֶׁזֶּה נֶדֶר” — רַבִּי מֵאִיר אוֹמֵר: לֹא יָפֵר; וַחֲכָמִים אוֹמְרִים: יָפֵר.
[If a man said:] “I know that there are nedarim, but I did not know that they could be revoked,” he can revoke [the neder]. [But if he said:] “I know that nedarim could be revoked, but I did not know that this was a neder” —- R' Meir says: He cannot revoke [it]; the Sages, however, say: He can revoke [it].