Qur'an Textual Problems
The Qur’an was not collected before Mohammed died.
Significant parts of the Qur’an were obtained from its reciters and memorizers but not from manuscripts. The accuracy of those codices is questionable because many reciters and memorizers of the Qur’an had already been killed in the battles of the war of the apostasies (ridda), which raged for seven months in Arabia in 633 right after the death of Muhammad. In fact, portions of the Qur'an were irretrievably lost in the Battle of Yamama when about 450 of the companions of Muhammad who had memorized the text of the Qur’an had perished:
“Many (of the passages) of the Qur'an that were sent down were known by those who died on the day of Yamama ... but they were not known (by those who) survived them, nor were they written down, nor had Abu Bakr, Umar or Uthman (by that time) collected the Qur'an, nor were they found with even one (person) after them” (Ibn Abi Dawud, Kitab al-Masahif, p.23).
In fact, Aisha, youngest wife of Muhammad, testified that certain verses of the Qur’an on suckling and stoning were lost (Muslim 8.3421). Second caliph ‘Umar bin al-Khattab stated emphatically that certain verses, including the verse of stoning adulterers, were lost (Bukhari 8.82.816-817; 9. .424; 4.52.299; 5.59.416, 421; Muslim 5.2286).
According to “Legal Opinions” (part 1, p. 102) of Sheikh Kishk:
“The four most important commentators were ibn ‘Abbas, ibn Mas’ud, ‘Ali ibn Abi Talib, and ‘Ubay ibn Ka’b al-Ansari”
However, according to Bukhari 6.61.510, the caliph ‘Uthman ibn ‘Affan (644-656 AD) commanded Zayd ibn Thabit together with Abdullah ibn Zubair, Sa’id ibn al-‘As and Abdul-Rahman ibn al-Harith to collect and edit the Qur’an. According to Islamic tradition, ‘Uthman’s text of the Qur’an was largely based on the text of the Qur’an in the possession of Hafsah (one of the wives of Muhammad and the daughter of ‘Umar bin al-Khattab). Other important Qur’anic codices were ignored. These important codices differed radically from Hafsah’s text though Mohammed favored Ibn Mas'ud.
Ibn Mas’ud was excluded from the committee despite the fact that Muhammad himself had considered him one of the best authorities on the Qur’an:
“Learn the recitation of the Qur’an from four: Abdullah ibn Mas’ud, Salim, the freed slave of Abu Hudhaifa, Mu’adh ibn Jabal, and Ubai ibn Ka’b” (Bukhari 5.57.104; 6.61.521, 522, 524).
It is significant that Muhammad did not mention Zaid ibn Thabit in this list.
As a result, the two full chapters (Surahs) of al-Hafd and al-Khal’, which were in the Qur’anic versions of ‘Ubay ibn Ka’b, ibn ‘Abbas (a cousin of Muhammad) and Abu Musa, were eliminated. In addition, Surah al-Fatihah (1), Surah al-Falaq (113) and Surah al-Nas (114) were added (al-Suyuti, al-Itqan fi ‘Ulum al-Qur’an, part 1, pp. 221-2). Those Surahs were not in ibn Mas’ud codex. More than 200 verses were dropped from Surah al-Ahzab (33) (al-Suyuti, al-Itqan, part 3, p.72). Al-Suyuti records the two deleted chapters (Surahs) of al-Hafd and al-Khal’ in their entirety in his “al-Itqan,” part 1, p. 185.
Twenty years after Muhammad’s death, the caliph ‘Uthman codified the revised Medinan codex and ordered the destruction of all other codices in order to standardize the consonantal text of the Qur’an.
After Mohammed's death, memorizers of portions of the Qur'an disagreed on verses of the text or were killed and thus portions of the Qur'an were lost forever. According to Muslim sources, Uthman collected what he wanted in the present text of the Qur'an and Uthman burned the portions he declined to include.