Abu Ahmad Al-Hakim: His hadith is weak (dhahib).
Abu Ahmad bin Adi Al-Jurjani: I consider his hadith to be upright (mustaqim), except that there are errors in his narrations and texts, but he does not intentionally lie.
Abu Al-Hasan bin Al-Qattan Al-Fassi: Truthful, and nothing has been proven against him that would discredit his hadith, except that there is disagreement about him. His hadith is Hasan (good).
Abu Al-Qasim bin Bashkuwal: An Egyptian, Mawla of Bani Hashim, he is alright. He was the writer of Al-Layth.
Abu Hatim bin Hibban Al-Busti: His hadith is very Munkar (rejected). He narrates from trustworthy narrators what does not resemble the hadith of the trustworthy. He has many Munkar narrations from famous Imams. He was truthful in himself. He used to write accounts for Al-Layth bin Sa'd and was his writer for tax revenues. The Munkar narrations in his hadith occurred because of a neighbor of his, a bad man.
Abu Zar'ah Al-Razi: I don't consider him to be someone who intentionally lies. His hadith is Hasan.
Abu Sa'id bin Yunus Al-Masri: He narrated Munkar hadith from Al-Layth.
Abu Ya'la Al-Khalili: A prominent writer of Al-Layth. They disagreed about him because of hadiths he narrated that contradicted others.
Ahmad bin Hanbal: He was firm in the beginning, then he became corrupt later on. He is not of significance.
Ahmad bin Shu'ayb Al-Nasa'i: He is not trustworthy. He once said: Yahya bin Bakir is more beloved to us than him.
Ahmad bin Salih Al-Masri: He is accused and is not of significance. He said something harsh about him.
Ibn Abi Hatim Al-Razi: An Egyptian, truthful and trustworthy as far as I know. He was the closest person to Al-Layth. He traveled with him day and night, in his travels and at home. He would go out with him to the countryside and the city, and would be alone with him at times when no one else was. As for the hadiths that Abu Salih narrated at the end of his life, which they criticized him for, we see that this is something fabricated by Khalid bin Nujayh, and...
Ibn Hajar Al-'Asqalani: Truthful, with many mistakes. He was included in his book. He had some forgetfulness, but his hadiths are acceptable according to Al-Bukhari.
Al-Dhahabi: He is lenient, a narrator of hadith.
Al-Nadr bin Abd Al-Jabbar: He used to praise him.
Sa'id bin 'Ufair Al-Ansari: He used to praise him.
Salih bin Muhammad Juzrah: In my opinion, he used to lie in hadith.
Abdullah bin Dawud Al-Khuraibi: I haven't seen anyone more firm (in memory) than Abu Salih.
Abd Al-Malik bin Shu'ayb Al-Masri: Trustworthy and reliable.
Ali bin Al-Madini: I rejected his hadith and did not narrate anything from him.
Muhammad bin Ishaq bin Khuzaymah: He had a neighbor with whom he had enmity. The neighbor used to fabricate hadith and attribute them to the Shaykh Abdullah bin Salih, writing them on a piece of paper in a handwriting similar to that of Abdullah bin Salih, and throwing it into his house among his books. Abdullah would find it and narrate it, thinking it was his own handwriting and hearing. This is how the Munkar narrations entered his narrations from his side.
Muslimah bin Al-Qasim Al-Andalusi: He is alright.
Authors of Tahrir Taqrib Al-Tahdhib: He had some issues with his memory. His hadith is Hasan in cases of corroboration.
Yahya bin Ma'in: He used to consider him trustworthy. And once he said: His book is reliable.
Ya'qub bin Sufyan Al-Faswi: A righteous man.