Abu Hatim al-Razi: A righteous and truthful man, but he was somewhat forgetful
Abu Hatim ibn Hibban al-Busti: He mentioned him in al-Thiqat
Ahmad ibn Hanbal: He was asked, "Whose narrations should we write down?" He said, "As for Makkah, then Ibn Umar
Ahmad ibn Shu'ayb al-Nasa'i: Righteous, he narrates through intermediaries
Ibn Hajar al-'Asqalani: Truthful
Al-Dhahabi: He titled him al-Hafiz
Muslim ibn al-Hajjaj al-Naysaburi: An authority, truthful
Muslimah ibn al-Qasim al-Andalusi: He is acceptable
Authors of Tahrir Taqrib al-Tahdhib: Trustworthy
Yahya ibn Ma'in: He declared him trustworthy