Sahih Muslim
The Book of Transactions (Kitab Al-Buyu)
Book Number: 010 / Hadith Number: 3650
Salim b. 'Abdullah (Allah be pleased with them) reported his father havingsaid this: I saw people being beaten during the lifetime of Allah's Messenger (may peace be upon him) in case they bought the foodgrain in bulk, and then sold them at that spot before taking it to their places. This hadith is narrated on the authority of 'Ubaidullah b. Abdullah b. 'Umar through another chain of transmitters (and the words are):" His father (Ibn 'Umar) used to buy foodgrains in bulk and then carried them to his people."