Sahih Bukhari Volume 8, Book 78, Hadith 6050

حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، قَالَ حَدَّثَنِي عَدِيُّ بْنُ ثَابِتٍ، قَالَ سَمِعْتُ سُلَيْمَانَ بْنَ صُرَدٍ، رَجُلاً مِنْ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم قَالَ اسْتَبَّ رَجُلاَنِ عِنْدَ النَّبِيِّ صلى الله عليه وسلم فَغَضِبَ أَحَدُهُمَا، فَاشْتَدَّ غَضَبُهُ حَتَّى انْتَفَخَ وَجْهُهُ وَتَغَيَّرَ، فَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ إِنِّي لأَعْلَمُ كَلِمَةً لَوْ قَالَهَا لَذَهَبَ عَنْهُ الَّذِي يَجِدُ ‏"‏‏.‏ فَانْطَلَقَ إِلَيْهِ الرَّجُلُ فَأَخْبَرَهُ بِقَوْلِ النَّبِيِّ صلى الله عليه وسلم وَقَالَ تَعَوَّذْ بِاللَّهِ مِنَ الشَّيْطَانِ‏.‏ فَقَالَ أَتُرَى بِي بَأْسٌ أَمَجْنُونٌ أَنَا اذْهَبْ‏.‏

Narrated By Sulaiman bin Surad : A man from the companions of the Prophet said, "Two men abused each other in front of the Prophet and one of them became angry and his anger became so intense that his face became swollen and changed. The Prophet said, "I know a word the saying of which will cause him to relax if he does say it." Then a man went to him and informed him of the statement of the Prophet and said, "Seek refuge with Allah from Satan." On that, angry man said, 'Do you find anything wrong with me? Am I insane? Go away!"