Instructions for Malik al-Ashtar upon his appointment as the governor of Egypt

Have control over (your) sense of prestige, any outburst of anger, the might of your arm and the sharpness of your tongue. Guard against all this by avoiding haste and by delaying severe action till your anger subsides and you regain your self-control. You cannot withhold yourself from this unless you bear in mind that you have to return to Allāh.