Making a vow if Allah grants her a good, kind, and wise husband

Q: My maternal grandfather compelled my mother to marry her cousin against her consent, as Bedouins used to do. This was forty years ago. After a period of time, my mother was divorced after she had only one daughter. When she returned to live at her father's home, she was faced with all kinds of difficulties. She was beaten, forced to pasture for the whole day, and ill-treated by her stepmother. However, she endured all this patiently and looked after her daughter. As she remained for many years under these circumstances, she vowed to slaughter a camel if she married a kind and reasonable husband who put an end to her hardships. My mother then got all that she wished for; she was married to my father (may Allah be merciful to him) and had a number of sons and daughters who are now all adults. Is it now Wajib (obligatory) on my mother to fulfill her vow?

A: It is Wajib on your mother to fulfill her vow as it is a vow to do an act of obedience to Allah (Exalted be He). Moreover, it is authentically reported that the Prophet (peace be upon him) said: Whoever vows to obey Allah, has to obey Him. She therefore has to slaughter a camel and distribute its meat amongst the poor and the needy.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.