He said: Muhammad b. Imran al-Marzbani reported to me from Abu Bakr Ahmad b. Muhammad b. Isa al-Makki, who reported from Abdullah b. Ahmad b. Hanbal, who reported from Abdul Rahman b. Swaleh, who reported from Muhammad b. Sa'd al- Ansari, who reported from Umar b. Abdillah Ibn Ya'la b. Murrah, from his father, from his grandfather Ya'la b. Murrah, who said:
I heard the PROPHET (SAWW), peace be upon him and his progeny, say to ALI B. ABI TALIB (ASWS), peace be upon him, "O ALI (ASWS) ! You are the master of the people after I have gone. So whoever obeys you, obeys me; and whoever disobeys you, disobeys me."
(Ref: Al-Amali Shaikh Mufeed: The Thirteenth Assembly : Hadees No. 5)