I saw Messenger of Allah ﷺ coming (or the Prophet ﷺ came) to the dumps of some people and urinated there while standing .  

لَقَدْ رَأَيْتُ رَسُولَ اللَّهِ ﷺ أَوْ قَالَ لَقَدْ أَتَى النَّبِيُّ ﷺ سُبَاطَةَ قَوْمٍ فَبَالَ قَائِمًا