A vow to slaughter an animal if his child is discharged from the hospital: is he permitted to eat from it?

Question:
He says: Honorable Shaykh, may Allah grant you success. A man vowed that if his child is discharged from the hospital, he will slaughter an animal. Is it permissible for him to eat from it and make it a feast for the neighbors to gather for, or is it obligatory for him to give it in charity?

Answer:
It depends on his intention. If he intended it for the poor, he must give it in charity to the poor and not eat anything from it, because it has all become a vow. But if he intended it for his neighbors or his friends, it falls under the category of doing a permissible act. He is given the choice between fulfilling it and paying the expiation for an oath. A vow to do a permissible act gives the choice between fulfilling it and paying the expiation for an oath, if his vow was for his family and his wealthy neighbors. But if he intended it for the poor, it becomes a vow that must be fulfilled. Yes.