Abu Ahmad ibn Adi al-Jurjani: No one follows him on his chains of narration or on his text, and he is among those declared weak
Abu Bakr al-Barqani: Abandoned
Abu Bakr al-Bazzar: Not strong
Abu Bakr al-Bayhaqi: Weak
Abu Ja'far al-'Uqayli: He reported rejected hadiths, and said: He is not followed on them
Abu Hatim al-Razi: Abandoned in Hadith
Abu Hatim ibn Hibban al-Busti: He inverts chains of narration and elevates mursal reports
Abu Zur'a al-Razi: Abandoned in Hadith, his Hadith is rejected, the weakest son of Abi Farwa is Ishaq
Abu Ya'la al-Khalili: They greatly weakened him
Ahmad ibn Hanbal: It is not permissible for me to narrate from Ishaq ibn Abi Farwa, he is not worthy of carrying or narrating from, his Hadith was abandoned
Ahmad ibn Shu'ayb al-Nasa'i: Abandoned in Hadith, and once: He is neither trustworthy nor is his Hadith written
Ibn Hajar al-'Asqalani: Abandoned in Hadith, and very weak
Al-Daraqutni: Abandoned, and once: Weak
Al-Dhahabi: They abandoned him
Zakariya ibn Yahya al-Saji: Weak in Hadith, not a proof
Abd al-Rahman ibn Yusuf ibn Kharash: Liar
Ali ibn al-Madini: His Hadith is rejected, Medinan
Amr ibn Ali al-Fallas: Abandoned in Hadith
Malik ibn Anas: He criticized him and abandoned him
Muhammad ibn Idris al-Shafi'i: He criticized him and abandoned him
Muhammad ibn Ishaq ibn Khuzayma: His Hadith is not used as proof
Muhammad ibn Isma'il al-Bukhari: They abandoned him, Medinan
Muhammad ibn Sa'd Katb al-Waqidi: He was abundant in Hadith, he narrated rejected hadiths and his Hadith is not used as proof
Muhammad ibn 'Umar al-Waqidi: Weak, rejected
Muslim ibn al-Hajjaj al-Naysaburi: Weak in Hadith
Yahya ibn Ma'in: From the route of Mu'awiya ibn Salih: His Hadith is not like that, and he said: His Hadith is not written, he is not anything, and once: Weak, and once: Not anything, and once: Liar
Ya'qub ibn Sufyan al-Faswi: His Hadith is not written