Sahih al-Bukhari 5636
صحيح البخاري#5636Sahihحَدَّثَنِي عَمْرُو بْنُ عَبَّاسٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، حَدَّثَنَا سُفْيَانُ، عَنْ سَالِمٍ أَبِي النَّضْرِ، عَنْ عُمَيْرٍ، مَوْلَى أُمِّ الْفَضْلِ عَنْ أُمِّ الْفَضْلِ، أَنَّهُمْ شَكُّوا فِي صَوْمِ النَّبِيِّ صلى الله عليه وسلم يَوْمَ عَرَفَةَ، فَبُعِثَ إِلَيْهِ بِقَدَحٍ مِنْ لَبَنٍ فَشَرِبَهُ.
Narrated Um Al-Fadl:that the people were in doubt whether the Prophet (ﷺ) was fasting on the Day of `Arafat or not, so a (wooden) drinking vessel full of milk was sent to him, and he drank it
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: 74:62