مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3674
Musnad of Abdullah bin Mas'ood
Abdullah (رضي الله عنه) said: I learned seventy soorahs from the lips of the Messenger of Allah (ﷺ) when Zaid bin Thabit was still a boy with braided hair, learning to read and write.
Musnad Ahmad 3697A saheeh hadeeth, this is a da'eef isnad]