The 15 Scribes of Divine Revelation
Hazrat Musleh-e-Maud (ra) further states:
“The following 15 names of scribes are those to whom the Holy Prophet (sa) dictated the Holy Quran and are proven from history. They are, Zaid bin Thabit (ra), Ubayy (ra) bin Kaab, Abdullah bin Saad bin Abi Sarah (ra), Zubair bin al-Awam (ra), Khalid bin Saeed bin al-Aas (ra), Aban bin Saeed al-Aas (ra), Hanzala bin al-Rabi al-Asadi (ra), Mu‘ayqib bin Abi Fatima (ra), Abdullah bin Arqam Zuhri (ra), Shurahbil bin Hasanah (ra), Abdullah bin Rawaha (ra), Hazrat Abu Bakr (ra), Hazrat Umar (ra), Hazrat Uthman (ra) and Hazrat Ali (ra). When [a portion] of the Holy Quran was revealed to the Holy Prophet (sa), he would call one of these individuals and dictate the revelation to him.”
(Dibachah Tafsir al-Quran, Anwar al-Ulum, Vol. 20, pp. 425-426)