Kol Nidrei
TefillahShabbos & Yom Tov
Rav Hai opposed the absolute annulment of vows on the eve of Yom Kippur. In his wording of Kol Nidrei, we pray that the Lord of Heaven absolve and pardon vows that were not fulfilled through neglect or under constraint.
Source: His formulation of the Kol Nidrei prayer