Here you will find the Poem Ch 01 Manner of Kings Story 34 of poet Sa di
One of the sons of Harun-ur-Rashid went to his father and angrily informed him that the son of an official had used insulting expressions towards him whereon Harun asked his courtiers what requital he deserved. One of them proposed capital punishment, another the amputation of the tongue whilst a third recommended fine and imprisonment. Then Harun said: "Oh my son, it would be generous to pardon him but, if thou art unable to do so, use likewise insulting expressions concerning his mother; not however to such a degree as to exceed the bounds of vengeance because in that case the wrong will be on thy side." He is not reputed a man by the wise Who contends with a furious elephant But he is a man in reality Who when angry speaks not idle words. An ill-humoured fellow insulted a man Who patiently bore it saying: "O hopeful youth, I am worse than thou speakest of me For I am more conscious of my faults than thou."