The Book of Virtue, Good Manners and Joining of the Ties of Relationship (Kitab Al-Birr was-Salat-I-wa'l-Adab)

Muslim :: Book 32 : Hadith 6313

Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: The strong-man is not one who wrestles well but the strong man is one who controls himself when he is in a fit of rage.