A part from a lengthy narration. Hazrat Ali (as) tells Haris from Hamadan
"................Then AMIRUL MO'MINEEN (ASWS) took (al-Harith) by his hand and said: "I hold your hand the way the PROPHET (SAWW), held my hand and said (when I complained to him about the envious Quraish and the hypocrites)
'Surely, on the Day of Judgement, I shall hold the rope of ALLAH (SWT) and cling to His safeguard, and you, O ALI (ASWS) ,you shall hold fast to my safeguard, and your descendants shall cling to your safeguard, and your Shias shall hold fast to the safeguard of all of you.
' So what will ALLAH (SWT) do to His PROPHET (SAWW)? And what will the PROPHET (SAWW) do to his successor? (The same shall we do to our followers). Take this, O Harith, the summary of all the details. Yes, you shall be with the one you love, and for you shall be what you have earned." He said this three times....................."
(Ref: Al-Amali Shaikh Mufeed: The First Assembly: Hadees No.3)