Hadith 4475
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، عَنْ إِسْمَاعِيلَ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " كُلُّ بَيِّعَيْنِ لاَ بَيْعَ بَيْنَهُمَا حَتَّى يَتَفَرَّقَا إِلاَّ بَيْعَ الْخِيَارِ " .
It was narrated from Ismail from 'Abdullah bin Dinar, from Ibn 'Umar, who said:"The Messenger of Allah said: '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
Sahih (Abu Ghuddah)
Sunan an-Nasaʾi 4475 · Book 44, Hadith 27