Abu Abd Allah Al-Hakim Al-Naysaburi: The most senior, most memorizing, and most knowledgeable of the Hadith of Zaidah than anyone else
Ahmad ibn Hanbal: I have not seen anyone better than Husayn al-Ja'fi and Sa'id ibn 'Amir
Ahmad ibn Salih Al-Jili: Trustworthy, he used to recite the Quran with mastery, and he was a righteous man. I have never seen a man better than him, and he was trustworthy. We never saw him except sitting, and he never traveled. He was handsome and wore good clothes and dyed (his hair).
Ibn Hajar Al-Asqalani: Trustworthy and devout
Sufyan ibn 'Uyaynah: They said to him: Husayn al-Ja'fi has arrived. So he jumped up and said: The best man ever has arrived
Uthman ibn Abi Shaybah: Excellent, excellent, trustworthy and truthful
Muhammad ibn Abd al-Rahman Al-Harawi: I have not seen anyone more precise than Husayn al-Ja'fi
Yahya ibn Ma'in: Trustworthy
Yahya ibn Yahya Al-Laythi: If there was anyone left of the Abdal (substitutes of the righteous), it would be Husayn al-Ja'fi
Ya'qub ibn Sufyan Al-Fasawi: Trustworthy