Sahih al-Bukhari 17
صحيح البخاري#17SahihNarrated Anas: The Prophet (ﷺ) said, "Love for the Ansar is a sign of faith and hatred for the Ansar is a sign of hypocrisy
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: 2:10