(The Caliph `Uthman ordered Zaid bin Thabit, Sa`id bin Al-As, `Abdullah bin Az-Zubair and `Abdur-Rahman bin Al-Harith bin Hisham to write the Qur'an in the form of a book (Mushafs) and said tothem. "In case you disagree with Zaid bin Thabit (Al-Ansari) regarding any dialectic Arabic utteranceof the Qur'an, then write it in the dialect of Quraish, for the Qur'an was revealed in this dialect." Sothey did it.