Abu Ahmad ibn Adi al-Jurjani: He narrates from him what no one follows him in, and he is between very weak
Abu al-Faraj ibn al-Jawzi: He is nothing, he used to fabricate hadith
Abu Hatim al-Razi: Weak, his hadith is not written, his hadith is gone
Abu Hatim ibn Hibban al-Busti: He was a righteous, worshipping sheikh, except that he would come from the famous with fabrications. He was one of those who would enter upon him and respond. If one heard his hadith, he would testify against him for fabrication
Abu Dawud al-Sijistani: Liar
Ahmad ibn Hanbal: Liar, do not write the hadith of Sayf ibn Muhammad, Sayf is nothing, he used to fabricate hadith, and once: I have violated the hadith of Sayf ibn Muhammad for a while, he is not trustworthy
Ahmad ibn Shuayb al-Nasa'i: Weak, and once: He is neither trustworthy nor reliable, abandoned
Ibrahim ibn Ya'qub al-Jawzajani: He is not strong in hadith
Ibn Hajar al-Asqalani: They accused him of lying, weak
Al-Daraqutni: Abandoned, he mentioned him among the weak and abandoned
Al-Dhahabi: Liar
Zakaria ibn Yahya al-Saji: He fabricates hadith
Zahir ibn Harb al-Nasa'i: He dropped him
Amr ibn Ali al-Fallas: Weak
Muhammad ibn Isma'il al-Bukhari: He is not followed, his hadith is gone
Yahya ibn Ma'in: A lying, evil sheikh, and once: He is not trustworthy, and once: A liar