It is narrated from Sayyiduna Anas bin Malik, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "Do not bear hatred against one another, do not envy one another, and do not turn your backs on one another. O servants of Allah! Be brothers to one another, and it is not lawful for a Muslim to remain angry with his (Muslim) brother for more than three nights."