Abu Hatim al-Razi: Trustworthy
Abu Hatim ibn Hibban al-Busti: He was among the devout worshippers, with knowledge of religion and adherence to extreme piety
Abu Nuaym al-Asbahani: He narrated from Shubah ibn al-Hajjaj that he said: I have not seen a man better and more virtuous than Zubayd
Ahmad ibn Shuayb al-Nasa'i: Trustworthy
Ahmad ibn Salih al-Jili: Trustworthy, upright in Hadith, and he was an Alid
Ibn Hajar al-Asqalani: Trustworthy, upright, devout
Al-Dhahabi: An authority, devoted to Allah
Shubah ibn al-Hajjaj: I have not seen a man better than him
Amr ibn Murrah al-Muradi: Truthful
Muhammad ibn Sa'd, the scribe of al-Waqidi: Trustworthy and he had Hadiths, and he was among the Sheikhs, but not with many Hadiths
Yahya ibn Sa'id al-Qattan: Upright
Yahya ibn Ma'in: Trustworthy
Ya'qub ibn Sufyan al-Faswi: Trustworthy, trustworthy, excellent, except that he was inclined towards Shi'ism