[Machine] I passed by the Messenger of Allah ﷺ while he was urinating, so I greeted him. He did not respond to me until he finished, went to a wall, struck it with a stick that he had with him, then he placed his hand on the wall and wiped his face and arms. He then responded to me. This narration is witnessed by Abu Salih, the scribe of Al-Laith, except that this part is missing: Abdul Rahman ibn Hurmuz Al-A'raj did not hear it from Ibn As-Sammah. He only heard it from Umayr, the freed slave of Ibn Abbas, who heard it from Ibn As-Sammah, and Ibrahim ibn Muhammad ibn Abi Yahya Al-Aslami, and Abu Al-Huwayrith, Abdul Rahman ibn Muawiya. They said: The scholars differ regarding their reliability, except that their narration mentioning the wiping of the arms is supported by a hadith from Ibn Umar.  

مَرَرْتُ عَلَى رَسُولِ اللهِ ﷺ وَهُوَ يَبُولُ فَسَلَّمْتُ عَلَيْهِ فَلَمْ يَرُدَّ عَلَيَّ حَتَّى قَامَ إِلَى جِدَارٍ فَحَتَهُ بِعَصًا كَانَتْ مَعَهُ ثُمَّ وَضَعَ يَدَيْهِ عَلَى الْجِدَارِ فَمَسَحَ وَجْهَهُ وَذِرَاعَيْهِ ثُمَّ رَدَّ عَلَيَّ وَهَذَا شَاهِدٌ لِرِوَايَةِ أَبِي صَالِحٍ كَاتَبِ اللَّيْثِ إِلَّا أَنَّ هَذَا مُنْقَطِعٌ عَبْدُ الرَّحْمَنِ بْنُ هُرْمُزٍ الْأَعْرَجُ لَمْ يَسْمَعْهُ مِنَ ابْنِ الصِّمَّةِ إِنَّمَا سَمِعَهُ مِنْ عُمَيْرٍ مَوْلَى ابْنِ عَبَّاسٍ عَنِ ابْنِ الصِّمَّةِ وَإِبْرَاهِيمَ بْنِ مُحَمَّدِ بْنِ أَبِي يَحْيَى الْأَسْلَمِيِّ وَأَبُو الْحُوَيْرِثِ عَبْدِ الرَّحْمَنِ بْنِ مُعَاوِيَةَ قَالَ قَدِ اخْتَلَفَ الْحُفَّاظُ فِي عَدَالَتِهِمَا إِلَّا أَنَّ لِرِوَايَتِهِمَا بِذِكْرِ الذِّرَاعَيْنِ فِيهِ شَاهِدٌ مِنْ حَدِيثِ ابْنِ عُمَرَ