سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 4503
The Book of Financial Transactions
Urging Someone to Cancel A Sale He Has already Agreed Upon So As To Sell Him Your 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 .
It was narrated from Ibn 'Umar that the Prophet (ﷺ) 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."
Sunan an-Nasa'i, 4503Sahih (Darussalam)