Ahmad ibn Hanbal: Wrote about him
Ibn Hajar al-Asqalani: Saduq (Truthful)
al-Dhahabi: Thiqah (Reliable)
Yahya bin Ja'far al-Baykandi: Apparently righteous and virtuous, prolific in hadith
Yahya bin Ma'in: There is nothing wrong with him, and once: Thiqah Saduq (Reliable, Truthful)
Yazid bin Muhammad al-Mawsili: Apparently righteous and virtuous, prolific in hadith