Sahih Muslim 1234
صحيح مسلم#1234SahihAbdullah b. Shakhkhir reported on the authority of his father that he said:I said prayer with the Messenger of Allah (ﷺ) and saw him spitting and rubbing it off with his shoe
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 5:72