Sunan an-Nasa'i, Volume 6, Book 48, Hadith 5067 (DarusSalam) ⓘ
It was narrated that Abu Wa'il said: "Ibn Mas'ud addressed us and said: 'How do you want me to recite? According to the recitation of Zaid bin Thabit, when I learned seventy-odd Surahs from the mouth of the Messenger of Allah [SAW] while Zaid was with the other boys with two braids?'"
أَخْبَرَنِي إِبْرَاهِيمُ بْنُ يَعْقُوبَ، قَالَ حَدَّثَنَا سَعِيدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا أَبُو شِهَابٍ، قَالَ حَدَّثَنَا الأَعْمَشُ، عَنْ أَبِي وَائِلٍ، قَالَ خَطَبَنَا ابْنُ مَسْعُودٍ فَقَالَ كَيْفَ تَأْمُرُونِّي أَقْرَأُ عَلَى قِرَاءَةِ زَيْدِ بْنِ ثَابِتٍ بَعْدَ مَا قَرَأْتُ مِنْ فِي رَسُولِ اللَّهِ صلى الله عليه وسلم بِضْعًا وَسَبْعِينَ سُورَةً وَإِنَّ زَيْدًا مَعَ الْغِلْمَانِ لَهُ ذُؤَابَتَانِ .
also referenced under: Hadith 5064 (Reference) & Book 48, Hadith 25 (In-Book)