The Book of Financial Transactions
44/17. Chapter:
The Town-Dweller Selling For A desert-Dweller
Sunan an-Nasai
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنِي سَالِمُ بْنُ نُوحٍ، قَالَ أَنْبَأَنَا يُونُسُ، عَنْ مُحَمَّدِ بْنِ سِيرِينَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ نُهِينَا أَنْ يَبِيعَ، حَاضِرٌ لِبَادٍ وَإِنْ كَانَ أَخَاهُ أَوْ أَبَاهُ .
It 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 )
Reference : Sunan an-Nasa'i 4493In-book reference : Book 44, Hadith 45English translation : Vol. 5, Book 44, Hadith 4498