Sunan Ibn Majah
1759
Sahih+3

It was narrated from Ibn Buraidah that his father said:“A woman came to the Prophet (ﷺ) and said: ‘O Messenger of Allah, my mother has died and she owed a fast. Should I fast on her behalf?’ He said: ‘Yes.’”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi