Mukhtasar Muslim

Sayedna Sulaiman bin Surad (may Allah be pleased with him) says that two men exchanged insults in the presence of the Messenger of Allah (peace and blessings be upon him). One of them became angry and his face turned red. The Prophet (peace and blessings be upon him) said: "I know a word, if this person says it, his anger will go away. That word is: (A‘udhu billahi min ash-shaytan ir-rajim)." One of those who heard this from the Messenger of Allah (peace and blessings be upon him) went and told the angry man what the Prophet had said. The man replied, "Do you think I am mad?"