Committed the Holy Qur’an to Memory

Hazrat Anas (ra) narrates that there were four people during the time of the Holy Prophet (sa) who committed the entire Quran to memory, all of whom were from the Ansar; Hazrat Ubayy (ra) bin Kaab, Hazrat Muaz bin Jabal (ra), Hazrat Abu Zaid (ra) and Hazrat Zaid bin Thabit (ra). This narration is from Sahih al-Bukhari.

(Sahih al-Bukhari, Kitab Manaqib al-Ansar, Bab Manaqib Zaid bin Thabit, Hadith 3810, translated version, Vol. 7, p. 290, Nazarat-e-Ishaat Rabwah)