4519An NasaiSahih (Darussalam)أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، عَنْ مَالِكٍ، وَاللَّيْثِ، - وَاللَّفْظُ لَهُ - عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ قَالَ لاَ يَبِيعُ أَحَدُكُمْ 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 : Book 44, Hadith 55 English translation : Vol. 5, Book 44, Hadith 4507