Asbagh bin Nobatah, from Salman, from the MESSENGER OF ALLAH (SWT) who said:
O people of Muhajerin and Ansar! Should I guide you to someone who will never lead you astray if you hold on to him?
The people replied, “Yes, O MESSENGER OF ALLAH (SWT)!”
The PROPHET (SAWW) said, “This is ALI (ASWS) my brother, my successor, my minister, my heir my caliph, and he is your IMAM. Love him for your love for me, and honour him the way you honour me. Jibraeel ordered me to tell you what I just said.
(Ref: Amaali Of Tousi 1:27)