Hadith 13942

(حديث مرفوع) حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ ، عَنْ شُعْبَةَ ، حَدَّثَنَا قَتَادَةُ . وحَدَّثَنَا حَجَّاجٌ ، قَالَ : سَمِعْتُ شُعْبَةَ يُحَدِّثُ ، عَنْ قَتَادَةَ ، عَنْ أَنَسٍ ، قَالَ : " جَمَعَ الْقُرْآنَ عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَرْبَعَةٌ ، قَالَ يَحْيَى : كُلُّهُمْ مِنَ الْأَنْصَارِ : أُبَيُّ بْنُ كَعْبٍ ، وَمُعَاذُ بْنُ جَبَلٍ ، وَزَيْدُ بْنُ ثَابِتٍ ، وَأَبُو زَيْدٍ " ، قَالَ : قُلْتُ : مَنْ أَبُو زَيْدٍ ؟ قَالَ : أَحَدُ عُمُومَتِي .
It is narrated from Hazrat Anas (may Allah be pleased with him) that during the blessed era of the Prophet (peace and blessings be upon him), four companions (may Allah be pleased with them) had memorized the entire Qur'an, and all four belonged to the Ansar: Hazrat Ubayy bin Ka'b (may Allah be pleased with him), Hazrat Mu'adh bin Jabal (may Allah be pleased with him), Hazrat Zaid bin Thabit (may Allah be pleased with him), and Hazrat Abu Zaid (may Allah be pleased with him). I asked about Abu Zaid, so he said that he was one of my uncles.
Hadith Reference مسند احمد / مسند المكثرين من الصحابة / 13942
Hadith Grading حکم دارالسلام: إسناده صحيح، خ: 3810، م: 2465