Sahih al-Bukhari 4888
صحيح البخاري#4888SahihNarrated `Umar:I recommend that my successor should take care of and secure the rights of the early emigrants; and I also advise my successor to be kind to the Ansar who had homes (in Medina) and had adopted the Faith, before the Prophet (ﷺ) migrated to them, and to accept the good from their good ones and excuse their wrong doers
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: 65:408