וְכִ֥י תֶחְדַּ֖ל לִנְדֹּ֑ר לֹֽא־יִהְיֶ֥ה בְךָ֖ חֵֽטְא׃
Jeżeli zaś zaniechasz ślubować, nie będzie na tobie grzechu;
Mishnah Nedarim
All the substitutes for vows have the validity of vows. Those for haramim have the validity of haramim, And those for oaths have the validity of oaths, And those for nazirite [vows] have the validity of nazirite [vows]. If one says to his fellow, “I am forbidden from you by a vow”; “I am separated from you”; “I am distanced from you”, “that I should eat from yours”, “that I should taste from yours”, he is prohibited. If he says: “I am banned to you”, Rabbi Akiba was inclined to rule stringently. [If one says] “As the vows of the wicked”, he has vowed in respect of being a nazirite, or a sacrifice, or an oath. [If he says] “As the vows of the fit”, he has said nothing. [But if he said] “As their freewill-offerings” he has vowed in respect of being nazirite and a sacrifice.
Mishnah Nedarim
Four types of vows the Sages have invalidated: Vows of incentive, vows of exaggeration, vows in error, and vows [broken] under pressure. Vows of incentive how so? If one was selling an article and said, “Konam that I will not reduce below a sela”; and the other replied, “Konam that I will not add above a shekel” both of them want [a price] of three denarii. Rabbi Eliezer ben Jacob says: Also one who wishes to subject his friend to a vow to eat with him, may say: “Every vow which I may make in the future shall be void”, providing that he remembers this at the time of the vow.