What did the Prophet Muhammad (peace be upon him) say when a woman came to him with the request to fast on behalf of her mother who died with an unfulfilled vow?
 Ibn Abbas (Allah be pleased with them) reported:                      A woman came to the Messenger of Allah (may peace be upon him) and said: Messenger of Allah, my mother has died and there is due from her a fast of vow; should I fast on her behalf? Thereupon he said: You see that if your mother had died in debt, would it not have been paid on her behalf? She said: Yes. He (the Holy Prophet) said: Then observe fast on behalf of your mother.