Sayyiduna Zubair bin Al-Awwam (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: The disease of the previous nations will spread among you, and that disease is envy and malice. It is something that shaves off the religion; it does not shave off hair (rather, it destroys the religion). By the One in whose hand is the soul of Muhammad (peace and blessings be upon him)! You cannot be true believers until you love one another. Shall I not tell you something which, if you do it, you will love one another? Spread salam (greetings of peace) among yourselves.