It was the custom of scholars [that] as long as one's daughter had not left him, he would say to her: “All nedarim which you have made in my house are revoked.” And so, too, the husband —- before she would come under his authority —- would say to her: “All nedarim which you have made prior to coming under my authority are revoked,” for once she comes under his authority, he cannot revoke [them].

A bogeres who had waited twelve months —- or a widow, thirty days —- R' Eliezer says: Since her husband is responsible for her sustenance, he can revoke [her nedarim]; the Sages, however, say: A husband cannot revoke [her nedarim] until she has entered his authority.

A woman awaiting a yavam —- whether one yavam or two yevamin —- R' Eliezer says: He may revoke [her nedarim]. R' Yehoshua says: [When she awaits] one, but not two. R' Akiva say: Neither [when she awaits] one, nor two. Said R' Eliezer: If he can revoke the nedarim of a wife whom he acquired on his own, surely he can revoke the nedarim of a wife acquired for him by Heaven! Said R' Akiva to him: No; if you said this for a woman he acquired on his own, [it is because] others have no rights to her; shall you say this for a woman acquired for him by Heaven, to whom others do have rights? Said R' Yehoshua to him: Akiva, your words [apply] when there are two yevamin; what do you answer when there is one yavam? He said to him: The yevamah is not as complete [a wife] to the yavam, as a betrothed woman is a complete [wife] to her husband.

One who says to his wife: “All the nedarim which you shall make, from now until I return from such and such a place are confirmed,” he said nothing. [But if he says:] “they shall be revoked” —- R' Eliezer says: [They are] revoked. The Sages, however, say: [They are] not revoked. Said R' Eliezer: If he can revoke nedarim which are already binding, should he not be able to revoke nedarim which are not yet binding? They said to him: It says (Numbers 30:14): Her husband can confirm it, and her husband can revoke it —- that which can be confirmed can be revoked; that which cannot be confirmed cannot be revoked.