Sahih al-Bukhari 5028
Book 66: Virtues of the Qur'an · Narrated by `Uthman bin `Affan
Arabic
حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا سُفْيَانُ، عَنْ عَلْقَمَةَ بْنِ مَرْثَدٍ، عَنْ أَبِي عَبْدِ الرَّحْمَنِ السُّلَمِيِّ، عَنْ عُثْمَانَ بْنِ عَفَّانَ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " إِنَّ أَفْضَلَكُمْ مَنْ تَعَلَّمَ الْقُرْآنَ وَعَلَّمَهُ ".
English translation
Narrated `Uthman bin `Affan:The Prophet (ﷺ) said, "The most superior among you (Muslims) are those who learn the Qur'an and teach it
Reference: Sahih al-Bukhari 5028, Book of Virtues of the Qur'an. English translation by Dr. Muhammad Muhsin Khan.