Sales and Trade
34/58. Chapter:
Not to cancel a bargain already agreed upon
Sahih Bukhari
حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكٌ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يَبِيعُ بَعْضُكُمْ عَلَى بَيْعِ أَخِيهِ ".
Narrated `Abdullah bin `Umar: Allah's Messenger (ﷺ) said, "Do not urge somebody to return what he has already bought (i.e. in optional sale) from another seller so as to sell him your own goods."
Reference : Sahih al-Bukhari 2139In-book reference : Book 34, Hadith 91USC-MSA web (English) reference : Vol. 3, Book 34, Hadith 349