SHAFAQNA – Hassan ibn Mahboob narrated from Shoaib Alaqr Qoofi who said: I heard from Imam Sadeq (AS) talking to his companions: Fear God and behave kindly towards each other and like each other for the sake of Allah (SWT), have connection with each other, visit each other and be affectionate towards each other; discuss our ways (Ahlul Bait) and remind them to each other in order to keep them alive [1, 2, 3].
 Kafi, Vol. 2, Page 175.
 Beharul Anwaar, Vol. 71, page 352.
 Wasaelul Shia, Hadith Number 16118.