And with this same chain (it is narrated from Sayyiduna Ibn Umar, may Allah be pleased with them both) that in the time of the Messenger of Allah, peace and blessings be upon him, we used to buy food (grain, produce), so he, peace and blessings be upon him, would send a man to us and command that before selling it again, we should move it from the place where we bought it to another place.