Sahih Muslim Book 39, Hadith Number 6756.

Chapter : The mischief of satan in the Muslim society and sending his detachments for the creation of turmoil, and there is a devil attached to every person.

Jabir reported that Allah’s Apostle (may peace be upon him) said: The Satan sends detachments of his own in order to put people to trial and the highest in rank, in his eyes, is one who is most notorious in sowing the seed of dissension.