"Abdullah bin Yasar the freed slave of Maimunah, and I came and entered upon Abu Juhaim bin Al-Harith bin Al-Sammah Al-Ansari. Abu Juhaim said: 'The Messenger of Allah ﷺ came back from the direction of Bi'r Al-jamal and was met by a man who greeted him with Salam, but the Messenger of Allah ﷺ did not return the greeting until he turned to the wall and wiped his face and hands, then he returned the greeting.'" (Using translation from Nasāʾī 311)  

أَبُو جُهَيْمٍ أَقْبَلَ رَسُولُ اللهِ ﷺ مِنْ نَحْوِ بِئْرِ الْجَمَلِ فَلَقِيَهُ رَجُلٌ فَسَلَّمَ عَلَيْهِ فَلَمْ يَرُدَّ رَسُولُ اللهِ ﷺ حَتَّى أَقْبَلَ عَلَى الْجِدَارِ «فَمَسَحَ بِوَجْهِهِ وَيَدَيْهِ ثُمَّ رَدَّ عَلَيْهِ السَّلَامُ»