أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ أَنْبَأَنَا مُحَمَّدٌ، قَالَ أَنْبَأَنَا شُعْبَةُ، عَنْ مَنْصُورٍ، قَالَ سَمِعْتُ أَبَا وَائِلٍ، أَنَّ حُذَيْفَةَ، قَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَتَى سُبَاطَةَ قَوْمٍ فَبَالَ قَائِمًا .
It was narrated that Mansur said: "I heard Abu Wa'il (say) that Hudhaifah said: 'The Messenger of Allah (PBUH) came to some people's garbage dump and urinated while standing.'" Translation Not Available
Book Ref: Sunan An Nisai Book 1 Hadith 27
Web Ref: Sunan An Nisai Vol 1 Book 1 Hadith 27