Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: I saw the people in the time of the Messenger of Allah (peace and blessings be upon him): when they bought grain by estimate, they would be beaten so that they would not sell it in that same place until they had moved it to their own quarters.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10691