Sunan an-Nasa'i 4493
سنن النسائي#4493SahihIt was narrated that Anas bin Malik said:"It was forbidden to us for a town-dweller to sell for a desert-dweller, even if he was his father or brother." (Sahih)
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 ZaiSahih - Agreed Upon
In-book reference: 44:45