Abu Ahmad ibn Adi al-Jurjani: He was initially accused of some fabrication, and Ibn Furat expelled him from Baghdad to Wasit, but Ali ibn Isa brought him back. He narrated and showed the virtues of Ali, then became a Hanbali and became a sheikh among them. He is known for seeking knowledge, and most of what he wrote was with his father, Abu Dawood. He entered Egypt, Syria, Iraq, and Khorasan, and he was accepted by the scholars of Hadith. As for his father's words...
Abu al-Shaykh al-Asbahani: He was knowledgeable in genealogy, history, flaws in Hadith, and military expeditions. He worked in every field of knowledge.
Abu Hatim ibn Hibban al-Busti: The trustworthy Hadith scholar and author.
Abu Hamid ibn Asad al-Maktabi: I have not seen anyone like him, meaning in knowledge, and I have not seen anyone like him after Ibrahim al-Harbi.
Abu Hafs Umar ibn Shahin: He dictated to us for years, and I never saw a book in his hand. After he became blind, his son Abu Muammar would sit under him with a book in his hand, and he would say to him, 'Hadith such and such,' and he would recite it from memory until he came to the gathering. Abu Tamam al-Zaynabi said to him, 'May Allah bless you, I have not seen anyone like you, unless it is Ibrahim al-Harbi.'
Abu Dawud al-Sijistani: My son Abdullah is a liar, and it is a misfortune that he seeks judgeship.' Ibn Adi said, 'As for his father's words about him, I do not know what he found out from him.'
Abu Ya'la al-Khalili: A Hadith scholar, an imam of his time, a scholar upon whom there was consensus. It was said, 'There are three imams in one time: Ibn Abi Dawood, Ibn Khuzaymah, and Ibn Abi Hatim.'
Ahmad ibn Muhammad al-Khalal: He had a better memory than his father, Abu Dawood.
Ibrahim ibn Uthman al-Asbahani: A liar.
Ibn Hajar al-Asqalani: The trustworthy Hadith scholar. And once he said, 'It was said, 'There are three imams in one time: Ibn Abi Dawood, Ibn Khuzaymah, and Ibn Abi Hatim.'
al-Khatib al-Baghdadi: He was understanding, knowledgeable, a Hadith scholar, and pious. He was accused of deviating from Ali ibn Abi Talib and inclining towards him.
al-Daraqutni: In the questions of Abu Abd al-Rahman al-Salami, he said, 'Trustworthy, but he makes many mistakes in speaking about Hadith.'
al-Dhahabi: The trustworthy Hadith scholar. He commented on his father's statement about him by saying, 'Perhaps he meant lying in his speech, not in Hadith, for he is an authority in what he narrated. Or he used to lie and deceive in his speech, then he grew old and repented, and adhered to truthfulness and piety.'
Salih ibn Muhammad al-Jazara: The Imam of Iraq in his time, and the most knowledgeable in the lands. The Sultan set up a pulpit for him and he narrated Hadith on it, due to his virtue and knowledge.
Yahya ibn Muhammad ibn Sa'id: What his father said about him is enough for us.
Yahya ibn Ma'in: Trustworthy.