Highest Knowledge in Recitations of the Holy Qur’an
The Holy Prophet (sa) once said that the most benevolent upon his people was Hazrat Abu Bakr (ra). The strictest with regard to God’s religion was Hazrat Umar (ra), meaning he was very strict in adhering to religious principles. The most modest was Hazrat Uthman (ra), as in he had achieved the greatest levels of modesty. The person with the greatest understanding of what is lawful and unlawful was Hazrat Muaz bin Jabal (ra). The person with the greatest awareness of his obligations was Hazrat Zaid (ra) bin Thabit. The person with the highest knowledge in recitations of the Holy Quran was Hazrat Ubayy (ra) bin Kaab. And every ummah has a Custodian; and the Custodian of this Ummah was Hazrat Abu Ubaidah bin Jarrah (ra) – whose accounts have been narrated previously.
(Jami‘ al-Tirmidhi, Abwab al-Manaqib, Bab Manaqib Muaz bin Jabal … Hadith 3790)