One day the Holy Prophet (peace be upon him and his holy progeny) and Abu Bakr were seated together when a person came up to Abu Bakr and began abusing and reviling him.
When the person had finished his outburst Abu Bakr, for the sake of defending himself, spoke out and in the process began to abuse the person.
The moment Abu Bakr began using foul language, the Holy Prophet (peace be upon him and his holy progeny), who till then had remained a mute spectator to the incident, suddenly got up from his place in order to distance himself from him.
As he (peace be upon him and his holy progeny) moved away, he commented: O’ Abu Bakr! When that person was abusing you, an angel of God, was answering the person in your defense, but the moment you began abusing him, that angel left you and his place was taken over by the Shaitaan; and I am not of the persons, who would sit in a gathering in which the Shaitaan is present.( Iblees Naameh, vol. 1, pg. 73; Ihyaa al-U’loom, vol. 3, pg. 370 )