And Allah the Exalted has said (in Surah Al-Imran) «والذين يجتنبون كبائر الإثم والفواحش وإذا ما غضبوا هم يغفرون‏ الذين ينفقون في السراء والضراء والكاظمين الغيظ والعافين عن الناس والله يحب المحسنين‏» "And (the beloved servants of Allah are those) who avoid major sins and indecencies, and when they are angry, they forgive. And those who spend (in charity) in prosperity and adversity, and those who restrain their anger and pardon people; and Allah loves the doers of good."

Narrated Abu Huraira: Allah's Apostle said, "The strong is not the one who overcomes the people by his strength, but the strong is the one who controls himself while in anger."