I sold a property of mine in the Valley to the Commander of the Faithful, Uthman bin Affan, in exchange for a property of his at Khaybar. When we had concluded the sale, I turned on my heels and hurried out of his house, fearing that he might revoke the deal. The custom was that the two parties to a sale retained the option to cancel it as long as they had not parted from one another.Abdullah said, "Once my sale and his became binding, I realized that I had gotten the better of him, since I had moved him to the land of Thamud, three nights' journey away, while he had moved me only to Medina, three nights' journey away."
قال أبو عبد الله وقال الليث حدثني عبد الرحمن بن خالد عن ابن شهاب عن سالم بن عبد الله
بعت من أمير المؤمنين عثمان بن عفان مالا بالوادي بمال له بخيبر فلما تبايعنا رجعت على عقبي حتى خرجت من بيته خشية أن يرادني البيع وكانت السنة أن المتبايعين بالخيار حتى يتفرقا قال عبد الله فلما وجب بيعي وبيعه رأيت أني قد غبنته بأني سقته إلى أرض ثمود بثلاث ليال وساقني إلى المدينة بثلاث ليال