Key figures: Uthman ibn Affan (3rd Caliph, r. 644–656 AD); Zayd ibn Thabit (chief compiler); Abu Bakr (first collection, ~632 AD after Battle of Yamama).

The Quran’s textual history involves two canonization moments. The first: after the Battle of Yamama (~632 AD), where many hafiz (those who had memorized the Quran) were killed, Abu Bakr commissioned Zayd ibn Thabit to compile the scattered revelations into a single document. This Abu Bakr codex was preserved by Hafsa bint Umar.

The second, definitive canonization: Caliph Uthman (~650 AD), alarmed by variant readings circulating as Islam spread to non-Arabic-speaking regions, commissioned a standardized text. Zayd ibn Thabit led a committee that produced the Uthmanic codex — the Mushaf — in the Qurayshi dialect of Arabic. Uthman sent copies to the major Muslim centers and reportedly ordered all variant manuscripts burned. This is the text of the Quran as it exists today.

Theological significance: Sunni Islam holds that the Uthmanic codex perfectly preserves the exact words revealed to Muhammad via Gabriel — the Quran is the uncreated speech of God (kalam Allah), a position defended by Ashari theology against the Mutazilite claim that the Quran was created. Shia tradition holds that Uthman’s compilation suppressed material favorable to Ali, and that the complete Quran known to Ali contained additional material. The Sanaa manuscripts (discovered 1972 in Yemen) show textual variants pre-dating the Uthmanic standardization, adding complexity to the canonical narrative.