What is the ruling on someone who has many vows and has sworn by Allah that they may exceed a month, so can he give money to a restaurant owner to feed the poor from what he and his family normally eat?

It is permissible for someone who owes an expiation for an oath (kaffarat yamin) or a vow (nadhr) involving feeding the poor to pay a restaurant owner to feed the poor on their behalf. However, if the vow is to fast or pray, feeding the poor is not sufficient; rather, the vowed act itself must be performed. The ruling varies depending on the type of vow.