במדבר, פרק ל׳, פסוק י״ד

The Torah establishes a delicate balance of authority within a household, granting a husband the ability to intervene in his wife's vows. However, this power is not absolute. It is carefully restricted to specific areas that directly impact her personal well-being or the harmony of their relationship. A husband cannot simply cancel any promise his wife makes. His authority applies specifically to vows that involve self-denial, causing her pain, discomfort, or a loss of enjoyment [רש"י, שטיינזלץ]. Such commitments might include fasting [אבן עזרא], abstaining from meat and wine, avoiding bathing, or refusing to wear colorful clothing [רבנו בחיי, The Torah]. This jurisdiction is expansive enough to cover even the most minor forms of deprivation, such as swearing off a single type of fruit or a specific spice. It also encompasses actions where the discomfort is not immediately felt but emerges over time, such as a prolonged refusal to bathe [תורה תמימה, מזרחי].

Beyond personal deprivation, commentators agree that a husband may also annul vows that disrupt the marital bond. These include promises that harm their intimacy or shared life, such as a vow to stop wearing makeup or to avoid marital relations [רמב"ן, טור, רבנו בחיי]. The underlying logic for this authority is rooted in the shared nature of marriage. A wife is committed to the well-being of the home, making the husband a directly affected party. When she suffers or takes on painful restrictions, he inevitably suffers alongside her [רבנו בחיי, הכתב והקבלה, מלבי"ם]. If a vow involves neither personal deprivation nor marital disruption, the husband has no power to intervene, and she must seek a sage to dissolve the vow like any other person [רבנו בחיי].

Although both types of vows can be canceled by the husband, the nature of the annulment differs significantly. Vows of self-denial are broken permanently and remain void even if the woman is later divorced or widowed. Conversely, vows affecting the marital relationship are only suspended while she remains married to that specific husband. Should the marriage end, those vows immediately take effect once again. Because vows of self-denial are the only ones that receive a complete and permanent cancellation, they are the primary focus of the Torah's instructions regarding this process [גור אריה, רש"ר הירש, תורה תמימה].

The process of upholding or breaking a vow carries unique legal conditions. Usually, Jewish law allows a person to appoint an agent to act on their behalf, but in this case, the husband must act personally and cannot delegate the task [תורה תמימה, הכתב והקבלה]. Furthermore, he can only address a vow that currently exists; he has no power to preemptively cancel or approve promises his wife has not yet made [תורה תמימה, הכתב והקבלה]. The rules also differ when a husband attempts to address only a portion of a vow. If he confirms just one part of it, the entire vow is upheld. However, if he tries to cancel only a part, the cancellation does not extend to the rest, because the element of suffering remains present in the un-canceled portion [מלבי"ם, תורה תמימה].

These principles also spark a discussion regarding a father's authority over his daughter's vows. The primary approach among commentators is that a father's jurisdiction is entirely identical to a husband's. He too is restricted to vows involving self-denial or interpersonal matters, and he likewise must act personally rather than through an agent [רמב"ן, טור, תורה תמימה]. Yet, a contrasting perspective suggests that because these specific limitations were only explicitly detailed regarding a husband, a father's authority might be entirely unrestricted, granting him the power to cancel any vow his daughter chooses to make [מזרחי, משכיל לדוד].