Narrated by:Abu Al-'Ala' bin Ash-Shikhir that his father said
It was narrated from Abu Al-'Ala' bin Ash-Shikhir that his father said:"I saw the Messenger of Allah (ﷺ) spit and then rub it with his left foot."
أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ سَعِيدٍ الْجُرَيْرِيِّ، عَنْ أَبِي الْعَلاَءِ بْنِ الشِّخِّيرِ، عَنْ أَبِيهِ، قَالَ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم تَنَخَّعَ فَدَلَكَهُ بِرِجْلِهِ الْيُسْرَى .
Nesai
The Book of the Masjids • Hadith 727