The Book of Purification
1/24. Chapter:
Allowing one To Urinate While Standing In A Desolate Area
Sunan an-Nasai
أَخْبَرَنَا مُؤَمَّلُ بْنُ هِشَامٍ، قَالَ أَنْبَأَنَا إِسْمَاعِيلُ، قَالَ أَخْبَرَنَا شُعْبَةُ، عَنْ سُلَيْمَانَ، عَنْ أَبِي وَائِلٍ، عَنْ حُذَيْفَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَتَى سُبَاطَةَ قَوْمٍ فَبَالَ قَائِمًا .
It was narrated from Hudhifah that the Messenger of Allah (ﷺ)came to some people's garbage dump and urinated while standing.
Reference : Sunan an-Nasa'i 26In-book reference : Book 1, Hadith 26English translation : Vol. 1, Book 1, Hadith 26