It wasnarrated from Ibn Buraidah that his father said:
"A woman cametothe Prophet (ﷺ) and said: 'O Messenger of Allah, my mother hasdied and she owed a fast. Should I fast on her behalf?' He said:'Yes.'"
English reference: Vol. 1, Book 7, Hadith 1759
Arabic reference: Book 7, Hadith 1831