Sahih al-Bukhari 1952
صحيح البخاري#1952Sahihحَدَّثَنَا مُحَمَّدُ بْنُ خَالِدٍ، حَدَّثَنَا مُحَمَّدُ بْنُ مُوسَى بْنِ أَعْيَنَ، حَدَّثَنَا أَبِي، عَنْ عَمْرِو بْنِ الْحَارِثِ، عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي جَعْفَرٍ، أَنَّ مُحَمَّدَ بْنَ جَعْفَرٍ، حَدَّثَهُ عَنْ عُرْوَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَنْ مَاتَ وَعَلَيْهِ صِيَامٌ صَامَ عَنْهُ وَلِيُّهُ ". تَابَعَهُ ابْنُ وَهْبٍ عَنْ عَمْرٍو. وَرَوَاهُ يَحْيَى بْنُ أَيُّوبَ عَنِ ابْنِ أَبِي جَعْفَرٍ.
Narrated `Aisha:Allah's Messenger (ﷺ) said, "Whoever died and he ought to have fasted (the missed days of Ramadan) then his guardians must fast on his behalf
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 30:59