Muḥammad b. Ismāʿīl b. Ibrāhīm > Yazīd > Hammām > Qatādah > al-Ḥasan > Samurah

"The Messenger of Allah said;" Two traders have the choice as long as they have not separated, or until they reach a deal that suits both of th4em or that is satisfactory (to both)"

أَخْبَرَنِي مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ إِبْرَاهِيمَ قَالَ حَدَّثَنَا يَزِيدُ قَالَ حَدَّثَنَا هَمَّامٌ عَنْ قَتَادَةَ عَنِ الْحَسَنِ عَنْ سَمُرَةَ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا أَوْ يَأْخُذْ أَحَدُهُمَا مَا رَضِيَ مِنْ صَاحِبِهِ وَمَا هَوِيَ»