Abu Hatim Ibn Hibban Al-Busti: He prayed before the death of the Prophet, peace and blessings be upon him, by two years, and he did not accompany him
Abu Nu'aym Al-Asbahani: He was equal to Shuraih in knowledge of jurisprudence, mature
Ahmad ibn Salih al-Jalil: Kufi, follower, trustworthy
Ibn Hajar al-'Asqalani: A jurist, firm
Al-Dhahabi: He embraced Islam during the lifetime of the Prophet, peace and blessings be upon him, and studied jurisprudence under Ali and Ibn Mas'ud, and once: He excelled in jurisprudence, and was firm in hadith
Jalaluddin al-Suyuti: He embraced Islam two years before the death of the Prophet, peace and blessings be upon him, and did not meet him
Khalil Ibn Aybak al-Safadi: One of the great jurists of Kufa, he embraced Islam at the time of the conquest, and did not meet the Prophet, peace and blessings be upon him
Sufyan ibn Uyainah: He was equal to Shuraih in knowledge and jurisprudence
Amr ibn Shurahil al-Sha'bi: He was equal to Shuraih in jurisprudence
Uthman ibn Sa'id al-Darimi: Trustworthy
Amr ibn Ali al-Fallas: Trustworthy
Muhammad ibn Sirin al-Basri: He was the chief of his people, and once: I have not seen a man more pious than Ubaydullah, and he was frequently with him, everything Ibrahim al-Nakha'i narrates from Ubaydullah except his opinion is from Abdullah except one hadith
Muhammad ibn Abdullah ibn Numayr: When Shuraih was unsure of a matter, he would write to Ubaydullah and abide by his ruling
Yahya ibn Ma'in: Trustworthy, one does not ask about someone like him