Al-Kāfi - The Book of Fasting

Chapter: The Case of a Person Who Passes Away Owing Fasting of the Month of Ramadan or Other Times 3ـ الْحُسَيْنُ بْنُ ٠َّدٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ الْوَشَّاءِ عَنْ أَبَانِ بْنِ عُثْ٠َ الأَنْصَارِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَ٠) قَالَ إِذَا صَا٠َ الرَّجُلُ شَيْئاً ٠َاتَ فَلَيْسَ عَلَيْهِ شَيْ‏ءٌ وَإِنْ صَحَّ ثُ٠َاتَ وَكَانَ لَهُ ٠َالٌ تُصُدِّقَ عَنْهُ ٠َكَانَ كُلِّ يَوْ٠َ عَنْهُ وَلِيُّهُ.

However, if he becomes well, then becomes ill then dies and leaves behind a certain amount of asset, for every day, one mud of food must be given on his behalf, and if he has not left behind any assets, his guardian must fast on his behalf.’” شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/320))