Narrated Buraidah: A woman came to the Messenger of Allah ﷺ and said: I donated my slave-girl to my mother, but she died and left the slave-girl. He said: Your reward became due, and she came back to you in inheritance. She said: She died while a month's fasting was due from her. Would it be sufficient or be taken as completed if I fast on her behalf ? He said: Yes. She said: She also did not perform Hajj. Would it be sufficient or be taken completed if I perform (Hajj) on her behalf ? He said: Yes.

Buraidah said A woman came to the Messenger of Allah ﷺ and said I gave a slave girl as sadaqah to my mother who has now died and has left that slave girl. He said your reward is sure and the inheritance has given her back to you.