Sahih Muslim
Sahih Muslim Book 020, Hadith Number 4556.
Hadith Section/Book: Sahih Muslim Sahih Muslim Book 20. On Government
Chapter : Instruction to stick to the main body of the Muslims in the time of trials and warning against those inviting people to disbelief.
The same tradition has been narrated by the same authority through another chain of transmitters with a slight difference in wording.