عن أبي هريرة أن رجلا قال للنبي: أوصني, قال: ((لا تغضب)). فردد مرارا; قال: ((لا تغضب)). رواه البخاري
From Abu Hurayrah that a man said to the Prophet sallallaahu 'alaihi wa sallam: "Give me the will". He replied, "You do not get mad!" The man repeated his request again and again, then the Prophet sallallaahu 'alaihi wa sallam said: "You do not be angry!"
[HR. al-Bukhari]
