question #3 Sahih al-Bukhari 5003, Book 66, Hadith 25 : How did the companions of the Prophet contribute to the compilation of the Qur’an?

I asked Anas bin Malik: “Who collected the Qur’an at the time of the Prophet (ﷺ) ?” He replied, “Four, all
of whom were from the Ansar: Ubai bin Ka`b, Mu`adh bin Jabal, Zaid bin Thabit and Abu Zaid.”