Al-Mansur or Abu Ja'far Abdallah ibn Muhammad al-Mansur was the second Abbasid Caliph reigning from 136 AH to 158 AH and succeeding his brother Abu al-'Abbas al-Saffah. Al-Mansur is generally regarded as the real founder of the Abbasid Caliphate, one of the largest polities in world history, for his role in stabilizing and institutionalizing the dynasty. He is also known for founding the 'round city' of Madinat al-Salam which was to become the core of imperial Baghdad. Wikipedia
“When thy enemy stretches out his hand to thee, cut it off if thou art able, otherwise kiss it.”
History of the Caliphs, p.275
