SHAFAQNA – Imam Ali (AS) said: Verily, you are brothers in religion. Nothing but evil mind/soul and ugly intentions have separated you from each other; you do not help each other, you are not well-intentioned, you are not forgiving and you are not friends with each other . It is also narrated from Imam Ali (AS) who said: Make your tongues to get used to say nice words and express greetings towards each other (say Salaam) in order that your friends are increased and you enemies are decreased .
 Nahjul Balaghah, Sermon 114.
 Tasnif Qorarul Hekam wa Dorarul Kalam, Page 435.