Sahih al-Bukhari 2081
صحيح البخاري#2081SahihNarrated Abu Mas`ud:An Ansari man, called Abu Shu'aib, came and told his butcher slave, "Prepare meals sufficient for five persons, for I want to invite the Prophet (ﷺ) along with four other persons as I saw signs of hunger on his face." Abu Shu'aib invited them and another person came along with them. The Prophet (ﷺ) said (to Abu Shu'aib), This man followed us, so if you allow him, he will join us, and if you want him to return, he will go back." Abu Shu'aib said, "No, I have allowed him (i.e. he, too, is welcomed to the meal)
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: 34:34