"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.,'"
قَالَ رَسُولُ اللَّهِ ﷺ كُلُّ بَيِّعَيْنِ لاَ بَيْعَ بَيْنَهُمَا حَتَّى يَتَفَرَّقَا إِلاَّ بَيْعَ الْخِيَارِ