Abu Dawud Sulayman ibn al-Ash’ath ibn Ishaq ibn Bashir ibn Amr ibn Imran al-Azdi al-Sijistani, known as Abu Dawud (202-275 AH), the imam of the people of hadith in his time, the hadith scholar of Basra, and the author of his famous book Sunan Abi Dawud, Abu Dawud was born in the year 202 AH during the reign of al-Ma’mun in a small region adjacent to Makran, the land of the Azd Baluchis, called Sijistan. He sought Hadith, so he visited Khurasan, Rayy, and Herat, and visited Kufa in 221 AH, and came to Baghdad several times, and the last time he visited it was in 271 AH, and stayed in Tartus for twenty years, and he also heard Hadith in Damascus and Egypt, then he settled in Basra at the request of Prince Abu Ahmed Al-Muwaffaq who came to his house in Baghdad and asked permission for him and asked him to settle in Basra so that students of knowledge could travel to it from all over the world, so that it would be rebuilt because of him after it had been destroyed and abandoned and people had been cut off from it due to the Zanj rebellion. Abu Dawood studied under Imam Ahmad bin Hanbal and was influenced by him in his approach to Hadith, and he also studied under Yahya bin Ma’in, Ali bin Al-Madini, Qutaybah bin Saeed, Yahya bin Saeed Al-Qattan and others. Al-Tirmidhi, Al-Nasa’i and others studied under him, and he wrote his book Al-Sunan, and presented it to Ahmad bin Hanbal, who approved of it and approved of it. He has other works on jurisprudence, belief, criticism and modification, abrogating and abrogated narrations, and the science of hadith, such as: Questions of Imam Ahmad, Questions of Abu Ubaid Muhammad bin Ali bin Uthman al-Ajurri, Questions of Ahmad bin Hanbal about narrators, trustworthy and weak narrators, Response to the People of Destiny, The Book of Resurrection and Resurrection, The Book of Asceticism, Evidence of Prophethood, The Virtues of the Helpers, Uniqueness in the Sunnah, and others. Abu Dawud died on the 16th of Shawwal in the year 275 AH.