If the buyers disagree

ʿUthmān b. Muḥammad > Hushaym > Ibn Abū Laylá > al-Qāsim b. ʿAbd al-Raḥman from his father > ʿAbdullāh

I heard the Messenger of Allah ﷺ saying, "When both parties to a transaction differ, the sale is valid as long as they are clear about what is being sold, and there is no discrepancy in their words. The statement of the seller is considered, or they may retract the sale." – Sound

أَخْبَرَنَا عُثْمَانُ بْنُ مُحَمَّدٍ حَدَّثَنَا هُشَيْمٌ حَدَّثَنَا ابْنُ أَبِي لَيْلَى عَنْ الْقَاسِمِ بْنِ عَبْدِ الرَّحْمَنِ عَنْ أَبِيهِ عَنْ عَبْدِ اللَّهِ قَالَ

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ «الْبَيِّعَانِ إِذَا اخْتَلَفَا وَالْبَيْعُ قَائِمٌ بِعَيْنِهِ وَلَيْسَ بَيْنَهُمَا بَيِّنَةٌ فَالْقَوْلُ مَا قَالَ الْبَائِعُ أَوْ يَتَرَادَّانِ الْبَيْعَ» – صحيح