Sunan an-Nasa'i 727
سنن النسائي#727SahihIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 8:40