Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Abu Raqad that he said: I went out with my master while I was a slave. I was brought to Hazrat Hudhaifa (may Allah be pleased with him) in a state that he was saying: If a person had spoken such words in the time of the Prophet (peace and blessings be upon him), he would have become a hypocrite. And indeed, I have heard these words from each one of you in every gathering four times. (These words are:) You must certainly enjoin good and you must certainly forbid evil, and you must certainly remain upon good, otherwise Allah will destroy you all through punishment, or He will appoint your wicked ones as rulers over you, then your good people will pray, but their prayers will not be accepted.