SHAFAQNA – Ibn K’hms narrated: I told Imam Sadeq (AS): Abdullah ibn Abi Ya’afoor sent his greetings to you. Imam Sadeq (AS) replied: Greetings be on you and him, when you return to him, send my regards and say: Jafar ibn Mohammad said: Have a good look at all the characteristics which caused Imam Ali (AS) to reach to such a great position with the Prophet of Islam (PBUH). Attach yourself to those characteristics and be certain that Ali (AS) reached that great position only and only for being honest, trustworthy and truthful .
 Kafi, Vol. 2, Page 104, Hadith 5.