Sahih al-Bukhari 2589
صحيح البخاري#2589SahihNarrated Ibn `Abbas:The Prophet (ﷺ) said, "One who takes back his gift (which he has already given) is like a dog that swallows its vomit
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: 51:23