משנה אויף במדבר 33:3

And these [vows] are not binding: [One who says] “What I eat of yours shall be unconsecrated”; “As the flesh of the swine”; “As an object of idolatrous worship”; “As hides pierced at the heart”; “As carrion”; “As terefoth”; “As abominations”; “As creeping things”; “As Aaron’s dough”; “As his terumah”--[in all these cases the vow is] not binding. If one says to his wife, “Behold! You are like my mother to me”, he must be given an opening on other grounds, in order that he should not act lightly in such matters. [If one says,] “Konam if I sleep”; “If I speak”; or “If I walk”; or if one says to his wife, “Konam if I cohabit with you,” he is liable to [the biblical prohibition] “he shall not break his word” (Numbers 30:. [If he says,] “I swear] an oath not to sleep”, or, “talk,” or, “walk,” he is forbidden [to do so].