Khuzayma ibn Thabit
Khuzayma ibn Thabit Dhu al-Shahadatayn al-Ansari was one of the companions of the Islamic prophet, Muhammad.
Biography
610–632: Muhammad's era
He was an Ansar and one among those on whose authority the Hadith of the pond of Khumm was reported.644–656: Uthman's era
Uthman ibn Affan told the sahaba to gather the Quran so they can compile it into an official book. Up to that point, it was memorized by the sahaba and kept together written on various materials. One complete copy was available with Hafsa which was prepared during First Caliph Abu Bakr.In the Itqan, Al-Suyuti discussed the number of witnesses required for writing down a revelation of Muhammad.