17 44482 Sunan an-Nasa'i 44 4466 The Book of Financial Transactions - كتاب البيوع "30153 20031 11201 11014 18" "أخبرنا عمرو بن علي، قال حدثنا يحيى، عن عبيد الله، قال حدثني نافع، عن ابن عمر، أن رسول الله صلى الله عليه وسلم قال "" البيعان بالخيار ما لم يفترقا أو يكون خيارا "" ." " It was narrated from Yahaya from 'Ubaidullah who said: ""Nafi narrated to me from Ibn 'Umar tht the Messenger of Allah said: 'the two parties to a transaction both have the choice so long as they have not separated or they have chosen."" (Sahih )"