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.
Sahih Muslim Book 21, Hadith 47
← Previous Hadith I saw people being beaten during the lifetime of Allah's Messenger (ﷺ) 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."

Sahih Muslim Book 21, Hadith 46 Next Hadith → Have you made lawful the transactions involving interest? Thereupon Marwan said: I have not done that. Thereupon Abu Huraira (ﷺ) said: You have made lawful the transactions with the help of documents only, whereas Allah's Messenger (ﷺ) forbade the transaction of foodgrains until full possession is taken of them. Marwan then addressed the people and forbade them to enter into such transactions (as are done with the help of documents). Sulaiman said: I saw the sentinels snatching (these documents) from the people.

Sahih Muslim Book 21, Hadith 48