Is it permissible to give Zakah

Q 2: My father used to give my grandmother some of the annual Zakah (obligatory charity) he pays on his wealth. When it was explained to him that she has been saving the money and not benefitting from it or buying anything with it, and that she asks the people for money and goes to eat with them, he has started to give the Zakah he used to give her to other people who need it. Is it correct or wrong to do so?

A: If the grandmother he used to give the Zakah to is your maternal grandmother and is a poor woman, then it is permissible for your father to give it to her, but if she is your paternal grandmother, then it is not permissible for him to give her any Zakah, and it is obligatory on him to give an amount equal to the money he gave her to the poor.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.