عَنْ أَنَسٍ رَضِيَ اللَّهُ عَنْهُ قَالَ جَمَعَ الْقُرْآنَ عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَرْبَعَةُ نَفَرٍ كُلُّهُمْ مِنَ الْأَنْصَارِ أُبَيُّ بْنُ كَعْبٍ وَمُعَاذُ بْنُ جَبَلٍ وَزَيْدُ بْنُ ثَابِتٍ وَأَبُو زَيْدٍ
Sayyiduna Anas (may Allah be pleased with him) narrates that during the blessed era of the Noble Prophet (peace and blessings be upon him), four individuals had memorized the entire Qur’an; all of them were from among the Ansar: Ubayy ibn Ka’b, Mu’adh ibn Jabal, Zayd ibn Thabit, and Abu Zayd.