Sahih al-Bukhari 2471
صحيح البخاري#2471Sahihحَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، عَنْ شُعْبَةَ، عَنْ مَنْصُورٍ، عَنْ أَبِي وَائِلٍ، عَنْ حُذَيْفَةَ ـ رضى الله عنه ـ قَالَ لَقَدْ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم، أَوْ قَالَ لَقَدْ أَتَى النَّبِيُّ صلى الله عليه وسلم سُبَاطَةَ قَوْمٍ فَبَالَ قَائِمًا.
Narrated Hudhaifa:I saw Allah's Messenger (ﷺ) coming (or the Prophet (ﷺ) came) to the dumps of some people and urinated there while standing
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: 46:32