It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Do not deceive one another in buying and selling, do not sever ties of kinship, do not compete with one another in the world, do not harbor envy and malice against one another, no person should bid over his brother’s bid, no townsman should sell the goods of a villager, leave people so that Allah may provide for them through one another, and no woman should set the condition of her sister’s divorce.