During the compilation of the standard written text of the Quran under the caliph Uthman in the mid seventh century, the process relied not only on written fragments but on cross-checking against those who had memorised the revelation directly from the Prophet, so that the huffaz of that first generation functioned as a living check on the accuracy of the written copies being produced and distributed to the provinces, a role the tradition credits with helping to secure a single agreed text across a rapidly expanding Muslim world.
That same idea, that memorisation is a check on the text rather than a mere devotional feat, continues in a more public and competitive form today: international Quran memorisation and recitation competitions, most prominently one held annually in Saudi Arabia, draw huffaz from across the Muslim world to be examined on the accuracy and quality of their memorised recitation, and dedicated schools for memorisation, widespread in South Asia and elsewhere, now train children specifically toward the hifz achievement from a young age, often alongside rather than instead of an ordinary general education, making the production of new huffaz an organised and continuing institutional effort rather than a purely individual pursuit.