Narrated by:15 2907 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. Sahih [Abu 'Eisa said:] This Hadith is Hasan Sahih.
Tirmizi
Chapters on The Virtues of the Qur'an • Hadith 3041