"You will not enter Paradise until you are Believers, and you will not be complete Believers until you love each other. Shall I not guide you to something which, if you do it you will have love for each other?! Spread the greeting of Salaam amongst yourselves."
[Saheeh Muslim: Book of Eemaan no. 93]
Translated by Aboo Talhah Daawood ibn Ronald Burbank. May Allaah reward him. Aameen.