(17) باب بَيْعِ الْحَاضِرِ لِلْبَادِي
It was narrated from Abu Hurairah that the Messenger of Allah said:
"Do not go out to meet the riders, and do not urge someone to cancel a sale he has already agreed upon os as to sell him your own goods, do not artificially inflate prices, and let not a town-dweller sell for a desert-dweller." (Sahih )
Reference: Sunan an-Nasa'i 4496
In-book reference: Book 44, Hadith 48
English translation: Vol. 5, Book 44, Hadith 4501