question #1 Sahih al-Bukhari 5004, Book 66, Hadith 26 : Who were the individuals known for collecting the Qur’an during the time of the Prophet’s death?

When the Prophet (ﷺ) died, none had collected the Qur’an but four persons;: Abu Ad-Darda’. Mu`adh bin
Jabal, Zaid bin Thabit and Abu Zaid. We were the inheritor (of Abu Zaid) as he had no offspring .