Most Knowledgeable and Well-versed
Ibn Abi Naji‘ narrates that the Holy Prophet (sa) appointed Hazrat Mu‘az (ra) as the governor of Yemen, stating to the people of Yemen, “Indeed I have sent to you a governor who is the most knowledgeable of my people and the most well-versed in the matters of faith.”
(Ibn Sa’d, al-Tabaqat al-Kubra, Vol. 3, Mu‘az (ra) bin Jabal… [Beirut, Lebanon: Dar al-Kutub al-Ilmiyyah, 1990], 438-439)