It is narrated from Sayyiduna Zubair bin Al-Awwam (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The disease of previous nations has also crept into you, that is, envy and malice. This disease shaves off the religion, not the head. By Him in Whose hand is the life of Muhammad (peace and blessings be upon him)! You will not be believers until you love one another. Shall I not tell you something which, if you act upon it, you will begin to love one another? Spread salam (greetings of peace) among yourselves.