Islamic civilization in Dar es Salaam

These are letters in which their author described an era of Islam, in which the light of knowledge shone, and in which great deeds were carried out, carried out by great men who filled the world with traces of their beauty. The author made the speech and narration in the tongue of a Persian traveler who traveled to most Islamic countries in the second hundred years of the Hijra, and who was surrounded by positions of state. Under the patronage of the Baramkeh, until Al-Rashid bereaved them.
The author says: "It was within the soul and determination of some of my companions that I should keep the hadith on his tongue until the caliphate of Al-Ma'mun, to describe what was true in it by beautifying Islam in terms of knowledge, forbearance, and chastity. However, I was keen on history not to introduce into it a story whose goodness was not sweetened by truth, nor It is attributed by attributing it to the book, If I preserved for the Persians their ranks in the Abbasid state after the Nakba of Baramkeh, because I I made it obligatory for myself to mention the facts as they were and the situation required them to be, not describing things except in their form, nor representing events and news except what was pending in the thoughts and current in the minds of the people of that time...And I have taken in the book evidence of chain of transmission to indicate what happened in the hadith. Travelers agree with the books of the ancients that we have before us."