Sunan an-Nasa'i 3699
سنن النسائي#3699SahihIt was narrated that Ibn 'Abbas said:"The Messenger of Allah said: 'It does not befit us to leave bad examples. The one who takes back his gift is like the dog which goes back to its vomit
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 32:12