It was narrated that 'Uthman bin 'Affan said that:
The Messenger of Allah said: (According to one of the narrators) Shu'bah (he) said: 'The best of you' (and according to) Sufyan (he) said: "The most excellent of you is the one who learns the Qur'an and teaches it." (ES)
English reference (ES): Vol. 1, Book 1, Hadith 211 (ES)
Arabic reference (ES): Book 1, Hadith 216 (ES)