The ruling on a vow to slaughter a sheep for a deceased person

Question:
Honorable Shaykh, a man passed away and he had a vow to slaughter a sheep. Does it come out of the partnership? And if he had no partnership, what is the ruling?

Answer:
Yes, this vow, if it is a vow of obedience—such as a vow to slaughter a sheep to give in charity to the poor and needy—then it is a vow of obedience, and it is obligatory to fulfill it, based on the saying of the Messenger (peace and blessings be upon him)
If he vowed it for Allah. But if he vowed it as a vow of disobedience, such as vowing it for a grave or for a wali (close friend of Allah), then that is not permissible. This is a vow of disobedience. The Messenger (peace and blessings be upon him) said: So if it is a vow of obedience, it is obligatory to fulfill it. If he has an estate, it is executed from his estate; what is needed to buy a sheep is taken from his estate and it is slaughtered, because this is a debt in his liability to Allah the Exalted. The Messenger (peace and blessings be upon him) said: "Allah is more deserving of being kept to." But if he has no estate and one of his relatives or one of his Muslim brothers wants to slaughter the sheep for him, that is a good thing. This benefits the deceased and clears his liability if it is done on his behalf. Yes.