If one vows to do something permissible, is it obligatory for him to fulfill it?

Question:
May Allah reward you, Your Eminence, father. The questioner says: If one vows to do something permissible, is he given the choice between fulfilling the vow or paying the expiation?

Answer:
Yes. If one makes a vow to do something permissible, such as vowing to buy a new garment and wear it, or to ride in a car, this is a permissible vow. He may do it if he wishes, or he may pay the expiation for an oath. Or if he vows to hold a feast and invite you, he is given the choice: he may hold the feast and invite you, or he may pay the expiation for an oath. Yes.