"I was walking with the Messenger of Allah ﷺ and he came to some people's garbage dump and urinated while standing up. I turned to go away, but he called me back (to conceal him), and I was just behind him. Then when he had finished, he performed Wudu' and wiped over his Khuffs." (Using translation from Nasāʾī 18)  

«كُنْتُ أَمْشِي مَعَ رَسُولِ اللهِ ﷺ فَانْتَهَى إِلَى سُبَاطَةِ قَوْمٍ فَبَالَ قَائِمًا فَتَنَحَّيْتُ عَنْهُ فَدَعَانِي فَكُنْتُ عِنْدَ عَقِبِهِ حَتَّى فَرَغَ ثُمَّ تَوَضَّأَ وَمَسَحَ عَلَى خُفَّيْهِ»