Sahih Muslim
The Book of Transactions (Kitab Al-Buyu)
Book Number: 010 / Hadith Number: 3651
Abu Huraira (Allah be pleased with him) reported Allah's Messenger (may peace be upon him) as saying: He who bought foodgrain should not sell it until he had measured it. In the narration of Abu Bakr there the word is Ibta' instead of Ishtara.