Sahih al-Bukhari 1818
صحيح البخاري#1818SahihNarrated Ka'b bin 'Ujra (ra):Allah's Messenger (ﷺ) saw him (i.e. Ka'b) while the lice were falling on his face
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 27:13