Narrated Abu 'Abdur-Rahman:
from 'Uthman bin 'Affan that the Messenger of Allah ﷺ said: "The best of you is he who learns the Qur'an and teaches it." Abu 'Abdur-Rahman said: "So that is why I sit at this seat of mine." And he taught the Qur'an during the time of 'Uthman until Al-Hajjaj bin Yusuf came.
• Jami` at-Tirmidhi, Vol. 5, Book of Virtues Of The Qur'an, Hadith 2907b
• Jami` at-Tirmidhi, Book of Virtues Of The Qur'an, Hadith 2907b