May a Man Eat From the Meat Which He Vowed to or not?
Question :
Is it permissible for a man to eat from the meat which he vowed to himself, or to one of his family?
Answer:
The vow to perform an act of obedience is based upon the intention of the one who made the yow within the limits of the purified Islamic Law. If he intended that the meat he vowed should be given to the poor, then it is not permissible. for him to eat from it. If he intended to feed his family or his companions, of whom he is considered one, it is permissible for him to eat it, as one of them, according to the saying of the Prophet ﷺ:
"Deeds are according to intentions and every person shall have what he intended."
Likewise if he made it a condition in his vow, or it was the custom of his country.
Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 6 Pages 434-435