(Gaon of Pumbeditha). Mishpatei Shevuoth [“A Treatise on Oaths”]

Hai Gaon was the last of the great Geonim of Mesopotamia. Only fragments of the Arabic original of this work are extant. This Hebrew rendering was compiled by an unknown translator. Hai Gaon was opposed to the absolute annulment of vows on the eve of the Day of Atonement and his formulation of the Kol Nidrei prayer reads; “Of all vows....which we have vowed..... and have omitted to fulfill either through neglect or under constraint, we pray that the Lord of heaven may absolve and pardon us.”