Sahih al-Bukhari 1270
صحيح البخاري#1270SahihNarrated Jabir:The Prophet (ﷺ) came to (the grave of) `Abdullah bin Ubai after his body was buried. The body was brought out and then the Prophet (ﷺ) put his saliva over the body and clothed it in his shirt
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: 23:31