(20) باب بَيْعِ الرَّجُلِ عَلَى بَيْعِ أَخِيهِ
It was narrated from Ibn 'Umar that the Prophet said:
"No one of you should urge someone to cancel a sale he has already agreed upon with his brother so as to sell him his own goods."
Reference: Sunan an-Nasa'i 4503
In-book reference: Book 44, Hadith 55
English translation: Vol. 5, Book 44, Hadith 4507