“When forbearance is mischievous, to pardon is weakness.”
History of the Caliphs, p. 263
Абуль-Абба́с Абдулла́х ибн Муха́ммад ас-Саффа́х — арабский халиф с 750 года, первый из династии Аббасидов. Праправнук Аббаса и старший брат аль-Мансура. Wikipedia

“When forbearance is mischievous, to pardon is weakness.”
History of the Caliphs, p. 263
“As power becomes great, concupiscence grows less.”
History of the Caliphs, p. 263
“It is rare that bounty is given unasked but a just claim is destroyed thereby.”
History of the Caliphs, p. 263