كتاب المناقب
30  
Fine Qualities
Anas told that in the time of God's messenger four people knew the whole Quran:
Ubayy b. Ka'b, Mu'adh b. Jabal, Zaid b. Thabit and Abu Zaid. Anas was asked who Abu Zaid was and replied that he was one of his paternal uncles[*]. *Ibn `Abd al-Barr, Isti'ab, p. 650, says he was Qais b. as-Sakan. Bukhari and Muslim.
وَعَن أنس قَالَ: جَمَعَ الْقُرْآنَ عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَرْبَعَةٌ: أُبَيُّ بْنِ كَعْبٍ وَمُعَاذِ بْنِ جَبَلٍ وَزَيْدِ بْنِ ثَابِتٍ وَأَبُو زَيْدٍ قِيلَ لِأَنَسٍ: مَنْ أَبُو زَيْدٍ؟ قَالَ: أحد عمومتي. مُتَّفق عَلَيْهِ
  مُتَّفق عَلَيْهِ   (الألباني) حكم   :
Sunnah.com reference : Book 30, Hadith 218
English translation : Book 26, Hadith 0
Arabic reference : Book 30, Hadith 6204