Is the 'Umrah and Hajj of a wife valid if her husband stipulated that she not perform Hajj or 'Umrah, and she then violated that condition, and what is incumbent upon the husband regarding his pledge?

Acceptance or rejection of 'Umrah or Hajj rests with Allah the Almighty. The validity of 'Umrah is determined by its correct performance and is not nullified by breaking a vow. If the wife has already performed Hajj and 'Umrah, she is not bound by a vow to refrain from performing Hajj or 'Umrah again. However, if she has not yet performed Hajj or 'Umrah, she is obligated to perform Hajj if she is able, because an obligation takes precedence over a supererogatory act, and there is no obligation to fulfill a vow that prevents the performance of an obligation.