It is narrated from Sayyiduna Zubair (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The diseases of the previous nations, that is, envy and malice, have also crept into you, and malice is something that shaves off—not the hair, but the religion. By the One in whose hand is the soul of Muhammad (peace and blessings be upon him)! You cannot enter Paradise until you become complete believers, and you cannot become complete believers until you love one another. Shall I not tell you of something which, if you do it, you will love one another? Spread the greeting of peace among yourselves."