Ahadith about Dajjal and Portents of the Hour Riyad as-Salihin 1858
Arabic hadith text
وعنها رضي الله عنها عن النبي صلى الله عليه وسلم قال: "من مات وعليه صوم، صام عنه وليه" ((متفق عليه)).
Translation
'Aishah (May Allah be pleased with her) said
The Prophet (ﷺ) said, "If a person dies without observing Saum (fasts), his Wali should make it up on his behalf."[Al-Bukhari and Muslim].