Abu Ahmad al-Hakim: He weakened his narrations from those who were not from al-Sham.
Abu Ahmad ibn Adi al-Jurjani: He is among those whose hadiths are written and used as evidence, especially in the hadiths of the people of al-Sham. And once: He is upright, but he mixes up and errs in the hadiths of Iraq and Hijaz.
Abu Ishaq al-Fazari: That man does not know what comes out of his head. And once: He abandoned him. And once: Do not write from Isma'il ibn Ayyash from those he knows or from those he does not know. When he narrated from those who were not from al-Sham, he became confused and made mistakes. And once: If he narrates to you from someone he knows, then write from him.
Abu al-Faraj ibn al-Jawzi: When he grew old, his memory changed, and mistakes increased in his hadith, and he was unaware of it.
Abu al-Qasim ibn Bashkuwal: Trustworthy in what he narrated from the people of his town, and not trustworthy in what he narrated from others.
Abu Bishr al-Dulabi: What he narrated from the people of al-Sham is more authentic.
Abu Bakr al-Bayhaqi: He is not relied upon, especially if he narrated from the people of Hijaz. And he once said: He is not strong.
Abu Ja'far al-'Uqayli: When he narrated from those who were not from al-Sham, he became confused and made mistakes.
Abu Hatim al-Razi: He is lenient in writing his hadith. I do not know anyone who rejected him except Abu Ishaq al-Fazari.
Abu Hatim ibn Hibban al-Busti: He was among the meticulous hadith scholars. When he grew old, his memory changed, so what he memorized in his youth and adulthood, he brought it as it was. And what he memorized in his old age from the hadith of strangers, he mixed up.
Abu Dawud al-Sijistani: I prefer him over Faraj ibn Fadalah.
Abu Zur'ah al-Razi: Trustworthy, except that he erred in the hadith of the people of Hijaz and the Iraqis.
Abu 'Abd Allah al-Hakim al-Naysaburi: One of the imams of the people of al-Sham. He was attributed to poor memory. And once: Despite his eminence, if he narrated a hadith alone, it was not accepted from him due to his poor memory.
Abu Mashar al-Ghasani: He used to take from those who were not trustworthy. So if his hadith is taken from the trustworthy narrators, then he is trustworthy.
Ahmad ibn Hanbal: In his narration from the people of Iraq and the people of Hijaz, there is some weakness. And his narration from the people of al-Sham is as if it is more stable and authentic. And once: I looked into his book from Yahya ibn Sa'id, and found authentic hadiths, and in al-Musnad, there are confusing hadiths. And he was asked about him, so he said: Baqiyyah is more beloved to me than him. And once: He narrates from every type.
Ahmad ibn Shu'ayb al-Nasa'i: Reliable in the hadith of the people of al-Sham. And once: Weak.
Ibn Hajar al-'Asqalani: Trustworthy in his narration from the people of his town, but he mixed up narrations from others.
al-Hakam ibn Nafi' al-Bahrani: He was among those who narrated the most from liars, and he is more reliable in the hadith of the trustworthy narrators from al-Sham than in the hadith of others.
al-Daraqutni: He is confused in hadith. And once he said about him: Weak. And once he said: Abandoned.
al-Dhahabi: Scholar of al-Sham, and one of the Shaykhs of Islam.
Dahim al-Dimashqi: Isma'il ibn Ayyash in the narrations of the people of al-Sham is excellent, but he mixed up narrations from the people of Medina.
Zakariya ibn Yahya al-Saji: He weakened his narrations from those who were not from al-Sham.
Abd al-Rahman ibn Mahdi: He narrated from him, then abandoned him and criticized his hadith.
Abd Allah ibn al-Mubarak al-Marwazi: If Isma'il ibn Ayyash and Baqiyyah are gathered in a hadith, then Baqiyyah is more beloved to me.
Ali ibn al-Madini: He was considered trustworthy in what he narrated from his companions, the people of al-Sham. As for what he narrated from those who were not from al-Sham, then there is weakness in it.
Ali ibn Hajar al-Sa'di: An authority, were it not for his many mistakes.
Amr ibn Ali al-Fallas: If he narrates from the people of his town, then he is authentic. And if he narrates from the people of Medina, then he is not reliable.
Muhammad ibn Ishaq ibn Khuzaymah: He is not relied upon.
Muhammad ibn Isma'il al-Bukhari: If he narrates from the people of his town, then he is authentic. And if he narrates from those who are not from his town, then there is a need for further scrutiny.
Muhammad ibn Abd Allah al-Makhrami: I do not find his hadith agreeable. And once: If Isma'il and Baqiyyah are gathered in a hadith, then Baqiyyah is more beloved to me.
Muhammad ibn Abd Allah ibn al-Barqi: He weakened his narrations from those who were not from al-Sham.
Muslim ibn al-Hajjaj al-Naysaburi: Do not write from him what he narrated from the well-known narrators or from others.
Wakee' ibn al-Jarrah: He mixes up in his narrations.
Yahya ibn Ma'in: The narration of Abbas al-Dawri: He is trustworthy, more beloved to me than Faraj ibn Fadalah. And once: I hope there is nothing wrong with him. The narration of Uthman ibn Abi Shaybah: Trustworthy in what he narrated from his companions, the people of al-Sham. And what he narrated from others, he mixed up in it. And as for his narration from the people of Hijaz, then his book is flawed, so he mixed up in his memorization from them. And once: There is nothing wrong with him from the people of al-Sham.
Yazid ibn Harun al-Ayli: I have not seen anyone from al-Sham or Iraq who has a better memory than Isma'il ibn Ayyash.
Ya'qub ibn Sufyan al-Faswi: Trustworthy, just, most knowledgeable of the hadith of al-Sham, and no one rejects him. And most of what they criticized him for is that he narrates from unknown narrators from Medina and Mecca.
Ya'qub ibn Shaybah al-Sadusi: Trustworthy according to Yahya ibn Ma'in and our companions, especially in what he narrated from the people of al-Sham. And in his narration from the people of Iraq and the people of Medina, there is a lot of confusion. And he was knowledgeable in his field.