Sources for Kol Nidrei Teaching, June 30 2025

All vows, and things we have made forbidden on ourselves, and oaths, and items we have consecrated to the Temple, and vows issued with the expression “konum,” and vows which are abbreviated, and vows issued with the expression “kanos,” that we have vowed, and sworn, and dedicated, and made forbidden upon ourselves; from this Yom Kippur until next Yom Kippur— may it come to us at a good time— We regret having made them; may they all be permitted, forgiven, eradicated and nullified, and may they not be valid or exist any longer. Our vows shall no longer be vows, and our prohibitions shall no longer be prohibited, and our oaths are no longer oaths.

“The order (of prayer) on the Night of Yom Kippur” - Containing six paragraphs.
On the Night of Yom Kippur the custom is that the reader says, “In the court of high, in the court of low (earthly); with the consent of God and with the consent of the congregation, we are permitted to pray together with the transgressors”, and it is customary that he say “Kol Nidrei”, (“All the Vows”) (and the entire prayer that follows) and afterward he says (the prayer) “שהחינו” without a cup (of wine).
Hagah: And afterwards they say the Evening Prayer. It is customary to recite “Kol Nidrei” while it was still day and to lengthen it with melodies until nightfall, and (“Kol Nidrei”) is said three times, and each time (the cantor) raises his voice “higher” (says it louder) than before, (מהרי״ל). And likewise the reader says the following prayer sentence three times; “And the entire congregation will be forgiven, (etc.)” And the congregation says three times, “And God said I forgave you according to your word”, (מנהגים). A man must not deviate from the custom of his city even in the melodies or piyyutim that are said there, (מהרי״ל).

Rav Natronai: And [about] that which you asked, whether the community may on Rosh Hashanah and Yom Kippur rescind all of the vows from this year to the next. The answer - [Tractate] Nedarim (Vows) has not been studied in the two yeshivot for a hundred years. And thus did the Master, Rav Yehudai Gaon, the light of the world, say - we do not study Nedarim, and we do not know to forbid or rescind it; neither a vow nor an oath. And we are not accustomed - neither in the yeshiva nor in any place - to rescind vows, not on Rosh Hashanah and not on Yom Kippur. But we have heard that in other lands, they say Kol Nidrei veAsirei (to rescind vows). [Yet] we have not seen [it] and we did not hear [about it] from our rabbis. And the law is that any vow that [a woman] makes in her husband's presence - in anything that she vows, whether she makes a vow about something that includes personal affliction, or whether it is something that does not include personal affliction - he may rescind for her. But the main thing is that it is on the day of his hearing it; so if he heard [it] and was silent, he may no [longer] rescind [it]. However he may not rescind an oath at all. So a woman who makes an oath in our days, when there is no sage to rescind an oath, remains with her oath, since there is no sage in our time who may rescind an oath. And thus is the law.