Nedarim 7B

ב״מנודה אני לך״, דרבי עקיבא סבר: לישנא דנידויא הוא, ורבנן סברי: לישנא דמשמתנא הוא.

They disagree with regard to a case when the language one uses is: I am ostracized from you, as R' Akiva holds that it is a language of distancing and therefore expresses a vow, and the Rabbis hold that it is a language of excommunication, and not the terminology with which people express vows.

ופליגא דרב חסדא. דההוא גברא דאמר ״משמתנא בנכסיה דבריה דרב ירמיה בר אבא״ אתא לקמיה דרב חסדא. אמר ליה: לית דחש לה להא דרבי עקיבא. קסבר: ב״משמתנא״ פליגי.

The Talmud comments: And Rav Pappa disagrees with the opinion of Rav Ḥisda, as demonstrated in the following incident: There was a certain man who said: I am excommunicated from the property of the son of Rav Yirmeya bar Abba. He came before Rav Ḥisda to ask whether this statement was effective in generating a prohibition or not. Rav Ḥisda said to him: There is no one who, in practice, is concerned for that opinion of R' Akiva. Apparently, Rav Ḥisda holds that they also disagree with regard to the phrase: I am excommunicated from you. This indicates that the dispute between the tanna’im is not with regard to specific terms but with regard to the more general question of whether terms of ostracism or excommunication are terms that can also express vows.

אמר רבי אילא אמר רב: נדהו בפניו ⁠— אין מתירין לו אלא בפניו. נדהו שלא בפניו ⁠— מתירין לו בין בפניו בין שלא בפניו.

§ R' Ila said that Rav said: If one ostracized another individual in his presence, one may dissolve it for him only in his presence. If one ostracized him not in his presence, one may dissolve it for him in his presence or not in his presence.

אמר רב חנין אמר רב: השומע הזכרת השם מפי חבירו צריך לנדותו, ואם לא נידהו ⁠— הוא עצמו יהא בנידוי. שכל מקום שהזכרת השם מצויה, שם עניות מצויה.

Rav Ḥanin said that Rav said: One who hears mention of the name of God in vain by another individual must ostracize him for doing so. And if he did not ostracize him, he himself, the listener, should be ostracized, as wherever mention of God’s name in vain is common, poverty is also common there.