It is narrated from Umm Darda (and she is the younger Umm Darda who was a scholar), that a man came to her and said: A person has spoken ill of you in the presence of Abdul Malik. She replied: If he has said something about us which is not in us, then for a long time virtues have been attributed to us which were not in us. (Abu Darda had two wives; when the first wife passed away, he married again, and she is called the younger Umm Darda.)

It is narrated from Sayyiduna Abdullah (Ibn Mas'ud): When a person says to his companion, "You are my enemy," then one of them goes out of Islam, or (if he says), "I am free from responsibility towards my companion."