Can an ongoing charity be performed for a deceased person who did not make such a bequest, and who has a sole son who does not pray for him? Does the reward of the charity accrue to the deceased or to the one who gives charity? Does "a righteous son who prays for him" mean that the son must be one of the deceased's own children only, or does it include grandchildren? Is it permissible for a person who was raised by the deceased to give charity on his behalf and pray for him?

It is commendable to establish an ongoing charity (sadaqah jariyah) for one's grandfather, as this is a form of righteousness and kindness towards him. Its reward reaches him whether he bequeathed it or not, and the presence of his direct son does not prevent this. Scholars have unanimously agreed that the reward of charity and supplication reaches the deceased. The benefit of charity accrues to both the deceased and the giver of charity; the reward is for the deceased, and the giver of charity is recompensed for doing good. It is not a condition for the child to be direct, as anyone related to the person, including their children and grandchildren, is considered a child to them. It is permissible for any Muslim to give charity on behalf of their Muslim brother or to supplicate for them, and this is especially affirmed in the case of grandchildren towards their grandfather, as they are considered among his children.