Muḥammad b. ʿAbdullāh b. ʿAbd al-Ḥakam > Shuʿayb > al-Layth > Ibn al-Hād > ʿAbdullāh b. Dīnār > ʿAbdullāh b. ʿUmar

"When two people meet to engage in trade, the transaction between them is not binding until they separate, unless they have chosen to conclude the transaction."

أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللهِ بْنِ عَبْدِ الْحَكَمِ عَنْ شُعَيْبٍ عَنِ اللَّيْثِ عَنِ ابْنِ الْهَادِ عَنْ عَبْدِ اللهِ بْنِ دِينَارٍ عَنْ عَبْدِ اللهِ بْنِ عُمَرَ

أَنَّهُ سَمِعَ رَسُولَ اللهِ ﷺ يَقُولُ «كُلُّ بَيِّعَيْنِ فَلَا بَيْعَ بَيْنَهُمَا حَتَّى يَتَفَرَّقَا إِلَّا بَيْعَ الْخِيَارِ»