Sayyiduna Abdullah bin Umar (may Allah be pleased with them) narrated that the Messenger of Allah (peace and blessings be upon him) said: The buyer and the seller both have the option (to cancel the transaction) as long as they have not separated from each other, except in the case of a sale with a stipulated option.
Hadith Referenceاللؤلؤ والمرجان / كتاب البيوع / 978
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 34 كتاب البيوع: 44 باب البيعان بالخيار ما لم يتفرقا»