Sahih al-Bukhari 4987

Anas ibn Malik reported that Hudhayfa ibn al-Yaman came to 'Uthman while the people of Syria were conquering Armenia and Azerbaijan with the people of Iraq. Hudhayfa was alarmed by the difference in their recitation. Hudhayfa said to 'Uthman, "Amir al-Mu'minin! Deliver this Community before they disagree about the Book as the Jews and Christians differed!" So 'Uthman sent a message to Hafsa, saying, "Send us the pages in your possession and we will copy them and then return them to you." So Hafsa sent them to 'Uthman. He ordered Zayd ibn Thabit, 'Abdullah ibn az-Zubayr, Sa'id ibn al-'As, and 'Abdu'r-Rahman ibn al-Harith ibn Hisham to transcribe copies. 'Uthman said to the group of the three Qurashis, "When you and Zayd ibn Thabit disagree about any of the Qur'an, write it in the dialect of Quraysh. It was revealed in their language." They did that. When they had copied it out, 'Uthman returned the pages to Hafsa and he sent a copy of what they had copied out to every region and commanded that every sheet or copy which had any other form of the Qur'an should be burned. Kharija ibn Zayd ibn Thabit added that he heard Zayd ibn Thabit say, "I missed one ayat of Surat al-Ahzab when we copied out the Qur'an which I used to hear the Messenger of Allah, may Allah bless him and grant him peace, recite. So we searched for it and found it with Khuzayma ibn Thabit al-Ansari: "Among the believers there are men who have been true to the contract they made with Allah." (33:23)