He said: "Abul Qasim Ja'far b. Muhammad b. Qawlawayh reported to me from Muhammad b. Yaqoob al-Kulayni, from Ali b. Ibrahim, from his father, from Hammad b. Isa from Huraiz, from Zurarah b. A'ayan, who reported that: ABU JA'FAR MUHAMMAD B. ALI B. AL-HUSAIN (peace be upon them all) said:
"The most important matter, the best, the key, the entrance to all affairs and the pleasure of the Gracious Lord lie in obedience to the Imam after have recognized him."
Then he said: ALLAH (SWT), Most High, says (in the Qur'an): "whoever obeys the MESSENGER (SAWW) , has obeyed ALLAH (SWT). But, whoever turns away: 'We have not sent you (MUHAMMAD (SAWW)) as a keeper over them.' (Al-Nisa: 80)"
(Ref: Al-Amali Shaikh Mufeed: The Eighth Assembly : Hadees No.4)