AVOIDANCE OF ANGER H 643 "Someone asked the Prophet, praise and peace be upon him, for advice. So he advised, 'Do not give way to anger.' The man repeated his request several times, and each time the Prophet, praise and peace be upon him, said the same, 'Do not give way to anger.'" R 643 Bukhari with a chain up to Abu Hurairah who related this hadith.
638- وعن أَبي هريرة رضي الله عنه : أنَّ رَجُلاً قَالَ للنبيِّ صلى الله عليه وآله وسلم : أوْصِني . قَالَ : "لاَ تَغْضَبْ" ، فَرَدَّدَ مِرَاراً ، قَالَ : "لاَ تَغْضَبْ" رواه البخاري .