She Vowed to Slaughter a She-camel and not to Eat From it, Then She Ate From it

Question :

A woman and her children were afflicted by illness and one of them died. She was in the hospital suffering because she did not know if her children who were at home were dead or alive. In this situation, she said: "O my Lord! If I find my children in the house alive, I will sacrifice a she- camel, and I will eat nothing of its meat, and I will fast a month for you." Indeed, she fasted for a month and slaughtered the she-camel, but it happened that she ate from its meat. The question here is: Is this she-camel whose meat she tasted sufficient for her, or must she slaughter another she-camel? Advise us and may Allah reward you with goodness.

Answer:

Since she vowed this slaughtered animal as a charity for Allah's sake, and since she is obliged to fulfill her vow-it being a vow to perform an act of obedience she must buy meat to the value of what she ate, and give it in charity to the poor. In this way she will be absolved of blame in this vow, if Allah, Most High wills.

Source:
Ibn Jibreen
Fatawa Islamiyah, Vol. 6 Page 436