Is it permissible for the heirs to fast on behalf of their father, since he passed away before making up what was due from him?

Question : Shaykh Muhammad, this woman is with us on the line. She mentions that her father broke his fast for ten days of Ramadan, and after Ramadan he did not fast these remaining days that were due from him, as he had become unable to comprehend. After that, he passed away. What is required of the family or the heirs regarding him? Do they fast on his behalf?

Answer : If they fast on his behalf, there is no harm, whether one person fasts on his behalf or a group of people fast on his behalf. For example, if he had ten days due from him and he has five sons, and each one fasts two days, there is no harm. And if they do not fast, they feed a poor person for each day. Approximately one kilogram of rice for each person.