It is narrated from Ibn Abbas (may Allah be pleased with him) that he said: "It is well known that a man gives a dinar to another and takes grain from him."
Hadith Referenceمسند الإمام الشافعي / كتاب البيوع / 1443
Hadith Takhrijاسناده قوی اخرجه البيهقى : 6 / 47 - وعبد الرزاق (14101)، (14102) ۔ وابن ابي شيبة: (19981)، (19982)۔