Vowing to slaughter a camel if she left her husband's house but dying before fulfilling her vow
It is obligatory for you to
slaughter the camel that your wife had vowed to sacrifice before she died on her behalf, if the value of the jewelry you took from her equals the price of a sacrificial camel. If she is leaving an inheritance and the value of the jewelry does not equal the price of a camel, you can take part of her inheritance to complete the value. If she did not leave any inheritance, except this, it would be better for you to complete the value of the camel from your own money and slaughter the camel she vowed to sacrifice, to fulfill the promise you made when she was still alive. The fulfillment of vows is obligatory, as the Prophet (peace be upon him) said,
“Anyone who vows to obey Allah, should obey Him.”
(Part No. 23; Page No. 324) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.