Interesting account from Coptic Sources regarding the Liberation of the Coptic people by the Muslim Commander and Sahaba, “Amr ibn al-As:
When Amr took full possession of the city of Alexandria, and settled its affairs, that infidel, the governor of Alexandria, feared, he being both prefect and patriarch of the city under the Romans, that Amr would kill him; therefore he sucked a poisoned ring, and died on the spot. But Sanutius, the believing dux, made known to Amr the circumstances of that militant father, the patriarch Benjamin, and how he was a fugitive from the Romans, through fear of them. Then Amr, son of Al-Asi, wrote to the provinces of Egypt a letter, in which he said: “There is protection and security for the place where Benjamin, the patriarch of the Coptic Christians is, and peace from God; therefore let him come forth secure and tranquil, and administer the affairs of his Church, and the government of his nation.”
Therefore when the holy Benjamin heard this, he returned to Alexandria with great joy, clothed with the crown of patience and sore conflict which had befallen the orthodox people through their persecution by the heretics, after having been absent during thirteen years, ten of which were years of Heraclius, the misbelieving Roman, with the three years before the Muslims conquered Alexandria. When Benjamin appeared, the people and the whole city rejoiced, and made his arrival known to Sanutius, the dux who believed in Christ, who had settled with the commander Amr that the patriarch should return, and had received a safe-conduct from Amr for him. Thereupon Sanutius went to the commander and announced that the patriarch had arrived, and Amr gave orders that Benjamin should be brought before him with honour and veneration and love. And Amr, when he saw the patriarch, received him with respect, and said to his companions and private friends: “Verily in all the lands of which we have taken possession hitherto I have never seen a man of God like this man.” For the Father Benjamin was beautiful of countenance, excellent in speech, discoursing with calmness and dignity.
Then Amr turned to him, and said to him: “Resume the government of all your churches and of your people, and administer their affairs. And if you will pray for me, that I may go to the West and to Pentapolis, and take possession of them, as I have of Egypt, and return to you in safety and speedily, I will do for you all that you shall ask of me.” Then the holy Benjamin prayed for Amr, and pronounced an eloquent discourse, which made Amr and those present with him marvel, and which contained words of exhortation and much profit for those that heard him; and he revealed certain matters to Amr, and departed from his presence honoured and revered. And all that the blessed father said to the commander Amr, son of Al-Asi, he found true, and not a letter of it was unfulfilled.