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 hatred, have also crept into you, and hatred is something that shaves—it does not shave hair, but it shaves the religion. By the One in whose hand is the soul of Muhammad (peace and blessings be upon him)! You cannot become complete believers until you love one another. Shall I not tell you a way, which if you adopt, you will begin to love one another? Spread the greeting of peace among yourselves."