The slaughter for a deceased person seen by the living in a dream, and eating the slaughtered animal

Question:
He says: Honorable Shaykh, may Allah grant you success. There are some common people, elderly, whose relative recently died. He visited him in a dream in the house, so he slaughters an animal for him as a mark of respect. We have been invited to a feast tomorrow, Wednesday. Do we accept this invitation, and is it permissible to eat this slaughtered animal?

Answer:
This is not permissible. This is a bid'ah (religious innovation). One does not perform a slaughter based on a dream; there are no forms of worship or rulings established based on dreams. It is not permissible, and you should point this out to them, that it is an error. If he wants to do something for the deceased, he should give charity on his behalf. If he does not wish to, then if he wants to benefit him, he gives charity on his behalf. If he did not see him, the dream benefits the deceased, or he makes du'a' (supplication) for him. If he is unable to give charity, he makes du'a' for him or seeks forgiveness for him.