Abu Huraira (may Allah be pleased with him) reports that the Prophet Muhammad (peace and blessings be upon him) said: Do not artificially raise prices (by bidding to increase the price), no townsman should sell for a villager, no man should make a deal over the deal of his (Muslim) brother, no man should propose over the proposal of his (Muslim) brother, and no woman should demand the divorce of her (Muslim) sister so that she may pour out her vessel.