Sayyiduna Abdullah (may Allah be pleased with him) said: "I recited seventy surahs from the mouth of the Messenger of Allah (peace and blessings be upon him)," while Zayd bin Thabit was a disbeliever in Allah and had not believed in Him (that is, he had not yet become a Muslim).
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8413