Abu Hatim ibn Hibban al-Busti: Mentioned him among the trustworthy narrators
Ahmad ibn Salih al-Jalil: Trustworthy
Ibn Hajar al-Asqalani: Acceptable
al-Dhahabi: Unknown
Authors of Tahrir Taqrib al-Tahdhib: Trustworthy, and al-Dhahabi's saying 'Unknown' is as if he did not come across Yaqub's authentication of him
Yaqub ibn Sufyan al-Faswi: Mentioned him among the trustworthy narrators