«المتبايعان كل واحد منهما بالخيار على صاحبه ما لم يتفرقا إلا بيع الخيار»
The Prophet (peace and blessings be upon him) said:
"Each of the seller and the buyer has the option over the other as long as they have not separated, except in a sale with a stipulated option."
Hadith Referenceصحیح الجامع الصغیر / حرف الميم / 6674