Sunan an-Nasa'i #4503 · The Book of Financial Transactions

Sunan an-Nasa'iIt was narrated from Ibn 'Umar that the Prophet said
Sunan an-Nasa'i · Book 44 · The Book of Financial Transactions
Sunan an-Nasa'i · كتاب 44 · كتاب البيوع والمعاملات
"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
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 ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 4503In-book reference : Book 44, Hadith 55