Slaughtering an animal for the deceased after seeing him in a dream and responding to the invitation to the feast

Question:
He says: Honorable Shaykh, may Allah grant you success. Some of the common people, when they see a deceased relative in a dream and visit him in his house, slaughter an animal for him as a sign of respect. We have been invited to a feast tomorrow, Wednesday. Should we accept this invitation? And is it permissible to eat from this slaughtered animal?

Answer:
There are no rulings in it, and rulings are not based on it. Nor are acts of worship based on it. This is not permissible. Point this out to them that it is an error. Yes. If he wants to benefit the deceased, he should give charity on his behalf, even if he did not see a dream. If he wants to benefit him, he should give charity on his behalf, even if he did not see a dream. And it may benefit the deceased. Yes. Or he should make du'a for him. If he does not want to give charity, he should make du'a for him or seek forgiveness for him.